Hi, I was wondering if someone could help me with this. The screw to the battery compartment hatch is eaten on my trailor and the batteries have leaked. I bought a working, but bad condition, junker for repairs, but need some advice. I can't use a soldering iron, don't know how and don't own one, should I cut the wires from both with enough slack to twist then use duct tape to bond them? Or should I remove the wires from both units at the solder then tape the wires to the working box? Or do I need someone to solder them? Thanks.