I'll add my story and photos to here also for others - sorry I didn't get photos of everything as I was worried about finishing. I'll try and get more later.
You need to remove the wipers, there is a cap to pop off, and 2x 16mm nuts to remove then I had to wiggle the wiper arms until the arms popped off.
There is then 2 small trox screws for the plastic that covers the the area under the windscreen, there are at the ends of the rubber seal.
Pull the rubber seal off and then remove the plastic plate.
The wiper motor is held in by 3x 10mm bolts, the clip is under the motor and can be a bug of a pain to get off/the motor out - I found rotating the front up then pulling it forward then up helped.
This will expose a grommet which I cut the tip off to protect the wire and seal the firewall from water.
For the area going from the wiper motor to the battery, I made a small vertical slice in the grommet behind the fuse box and fed the cable through that.
I connected the head of the amp power wire to the flat connection point where the short battery terminal cable bolts to the fuse box on top of the battery box. (no photo but will get one)
Remove the trip panel that runs along the door bottom, it's a bit fun around the bonnet release, you might need to reach behind the panel from the footwell to help pop off the clip behind the bonnet release.
You will need to remove the glove box, there is 3x press lock plastic clips under the glove box to remove the carpet panel. There is 4x trox head screws in the glove box (3x on the front upper edge and 1x in the center of the roof of the glove box), the fuse box cover just needs a flathead screwdriver to unlock the plastic cover.
There are 2 plastic clips on the side of the glove box that clip onto the dash. yiu need to lift the clip to release these, You need to remove the plastic cover on the side of the glove box, this is held in by 3x metal clips, so a bit of force is needed to pull it off - mine had a picture of an air bag with a line through it... Don't worry there is no airbag there / attached to the plastic.
To feed the wire through the grommet I found I needed to push a large Phillips head screwdriver (larger than the cable) and wiggle it around as I move it through the firewall and sound deadening to all the cable to easily go through.
Once the cable was through it came down the center of the car side of the fuse box, I ran the cable between the black fuse box and the white mounting bracket for the fuse box and down behind the bonnet release leaver.
I lifted the door seal off the bottom of the door and lifted the carpet over the plastic clips so I could run the power cable inside the factory loom runner, the cable just pops inside the clips.
I removed the rear seat base, there is 2 clips that you need to pull the seat out, they are located in the front middle of each seating spot, just grab the edge of the seat where your crotch would be I'd you where sitting there and lift with a bit of force and the seat will unclipped and you will giggle and how minimal it is.
To get the cable under the rear 1/4 panel trim and over the seat ledge, I just rolled / pushed it under the lip and wiggled it into place, and then down along the seat belt buckle area.
I feed the cable under the folding rear seat and taped it into place.
I'll add more to this later as I'm getting sleepy... But wanted to start the write up. I'll get some more photos tomorrow.
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