just wondering if anyone knows how to get wires from the inside of the cabin to the inside of the tray, more specifically, down the side...i have to run an electrical cable from the battery to down near the brake light...it has to be hidden and kept from the weather, so far i've run it thorugh the firewall and under the plastic trims that sit under the door

now i have to get it past the back wall of the ute (the part underneath the rear window) and to run down the side of my tray...i've taken some trims off and have found that i can't get the wire through because it's all just metal...is there another way to get around that...im tempted to drill straight through it

any suggestions?

cheers everyone