I don't have this particular kit but that's how I've wired mine. Loads of room to run a cable down to a piggyback fuse.I just pulled mine across the headliner and down the B pillar after wrapping it in some anti rattle tape. There is a huge gap between the roof and headliner so no need to remove it, I just poked through some old plastic fuel line I had, then I pulled the plastic trim from the B pillar and went into the fusebox that’s there for my factory leisure battery / towing pack. It wasn’t a big job at all.