Split charge relay on 1983 Trident

[stephenwalls]

Hi everyone,
I want to fit a split charge relay on my 1988 T25 autosleeper Trident, so I need to run a wire from the van battery under the drivers seat to the leisure battery under the passenger seat. There seems to be a channel for wires on the left hand side of the vehicle battery bay. I've pulled up some of the carpet on the raised section between the two seats which has exposed some screws. Is it just a matter of removing these screws to access the wiring channel underneath? or am I being very optimistic?
I thought I'd ask for some advice as the carpet is glued down and I dont want to pull it all out if it's not going to help!

Many thanks

Steve

[Mocki]