About 50 years ago, my uncle was welding a suspension top mount plate on his Anglia and set fire to the wiring loom under the bonnet. It had about 20 wires going to the ignition, dynamo, lights etc. We cut the loom out of another car in the scrappie's and joined them up by just stripping and twisting the individual wires together, covering the bare wires with insulating tape and then wrapping the whole lot in insulating tape. By the time we had finished, we had a bulge in the wiring loom as big as a fist! It worked though.