A bit of confusion here, if the cable you plan to use is only 13mm diameter then a cable that is 16mm diameter is bigger.....................
If you look at the fuse box there is a "break out" section where I have routed the cable from the rear, almost as if it was designed to be used like this.
If you are running an additional fuse box it should be after the large fuse, not before, so your supply should come from the other bolt (top of the picture) where there is plenty of room to run the smaller cable.
You are welcome, I've done this on 3 cars now so am happy to share the details.
Not particularly sure how there is confusion from my wording, cable size is always refered to as mm2 being the cross sectional area.
50mm2 is the planned cable size. Which i mentioned has an actual diameter of 13mm.
You mention you used 16mm cable. Now i don't know whether you meant to put it down as 16mm2 or 16mm diameter. In which case 16mm diameter cable is larger than 50mm2.
If however you used 16mm2 cable, that has a nominal diameter of 9.1mm, and cannot carry the neccessary amps to start the engine properly especially with the associated volt drop. As many other battery relocation users have mentioned when doing this to other cars.
So i can only assume you mean you've used 16mm diameter cable rather than specify the correct terminology of mm2 (CSA)?
Yes that's correct there is an additional formed section in the fuse box and cover to look as if it can be used for cable routing.
My extra fuse box carries a fuse of 80amps so it doesn't matter if it connects before or after the mega fuse since it's protected by it's own separate fuse.
There doesn't seem to be much room at the top of the fuse box especially since the wiring loom attaches at this point as well as the alternator lead.