Guess I'll do the battery relocation first. I did this and the catch can at the same time over 2 or 3 days, but some of the pics are still uploading.
I didn't get a pic of all the bits and pieces I used, but basically its just 5 meters of welding cable, around 0-1 gauge (32mm squared) a positive and a negative battery clamp, a junction box, and various sized 8mm ring terminals
So, first off I routed the cable from the engine bay through the car and into the boot. Access to the grommet in the engine bay isn't great and I did try for a while to get it off but in the en I just cut through it and fed the wire through, needs tidying up later

I took all the interior trim off that needed to be removed, pulled back the carpet and fed it through up to the rear seats, following the wires that were already there through a tunnel thing under the seats and into the boot, then ran it around the edge of the boot under the carpet and up to the box. I put the terminal on later but no pic of that




Also uncovered this thing, anyone know what is it?


Next up was the negative wire. I pulled back the carpet around the box and wheel arch looking for a good spot. not really many options tbh, basically either through the arch which would mean having to bolt through the exterior of the arch which I didn't want to do, or just behind the arch as shown in the pic where I could get behind and so have both nut and bolt on the interior



and here it is in the box with the terminal attached

so that's all the new wiring routed and ready. Next up was fitting the junction box and fitting the new 8mm terminals onto the old wiring. original trminals are something like 6 or 7mm, just to small for the junction box which was a bit annoying

So I set to cutting the ends off and fitting the new terminals. I didnt get any pics as almost as soon as I cut the first wire it started to lightly rain and I started panicing as I now had a car that couldn't be moved

Pretty straight forward, cut the old terminals off, crimp on the new ones. Also as the old battery terminal was grounding the engine block to the bodywork, I had to cut the negative terminal off and ground the engine directly to the body. I used the original grounding points under the battery tray, there are 2 under there but I only used 1 and used to other one to bolt the junction box to. I mounted it onto a block of wood so I could angle it the right way without the other wiring getting in the way


and thats pretty much it for the battery, tidied a few things up but thats all the work done. here it is sitting it ins nice new cosy home in the boot away from the cold


next up catch can install