Back in the early 80's I was NCOIC installing and repairing GRIATS- ground infantry attack systems( pronounced gritts). These are the power units that make the targets pop up.The power source was a marine deep cycle battery for each unit. I was hungover,hot,tired,pissed and being eaten alive by black flies, and the unit training on that live fire range was due onsite by 1300 hrs. Right next to each power unit I installed a hoffman device.A tube like device that I inserted an electrically fired charge in, that simulated a grenade, LAW, M203 etc strike or launch and also smoke grenades.I noticed that the cables would be just the right size to make mini jumper cables for my Superglide. When I got back to the shop that night I pulled 12 feet of cable off the bulk reel, cut it in half and crimped heavy duty midi alligator clips on the ends. Still have it somewhere in the garage.