2 many electric questions

I thought I's share a pic of my workshop. I've managed to find all the "house" circuits except for the clump that is buried inside the window structure for nav, anchor and wipers. Once I cut the VOM lead and spliced in a long wire with an alligator clip the results began to flow. I hadn't realized that I was going to get a resistance reading on just about everything I touched, but the true continuity is the only one that drops from 1 right down to zero. Anyhow, here's the shop, c/w heater now installed: