Wrenching on the wankle

Today's mission is the '71 Arctic Cat Panther 303, thats a wankle rotary engine in there...
I'd dis-mounted the engine last year because the exhaust was no good. I've been working on a replacement from a Cub Cadet tractor muffler. The problem is its too danged long, I can't make it fit correctly. I cut the pipe down where it goes into the exhaust but it still won't work. Hmmm, that'l require thought. Best thing I think would be to cut the muffler down, I'm not sure if I can cut that accurately with my grinder, maybe I'll try a hacksaw.
In the meantime to practice welding I'd welded a sheet of stovepipe around the old pipe. Interestingly even after I'd cut the pipe down it still fit the old exhaust correctly. I may have to use some RTV to make a gasket but I think it'll work, at least for awhile.
The problem now is I don't remember how the wiring works... There are a couple plugs but then there are a stack of wires that if I remember correctly all go to a common ground. I'm not sure about that though. I also don't remember where the wiring hold strap goes or how. From what I remember the ground wires were all just stuck under a screw...
I guess I could get the sled started and start grounding things...
The last problem, I found that one wire (one of the ground wires I think) pulled out of the main harness, it was butt connected. I HATE crimp on connectors, they're forever coming apart. I'll solder it back together. I can't find any solder though which is obnoxious. I used it just the other day to tin the hood cable for the Tigre.
Ahh well, I'm sure theres some in the basement, I'll try again tomorrow.

-Curt