My last post was for Scotty and the wiring in tank. I only ran twin 4mm for ya work light as it's only a 50w bulb. When you decide to fit 2 reverse spot lights (2x55w) you will need to run another 4mm single for them and earth them to the - on the twin I've all ready run. I should have run it in that harness to the rack just in case/for future addition of spot lights. No biggie.