Electrical issues

I am getting to know this place too well. I have fixed my issues with the gas line and I thought I fixed my leads but I was wrong. Today I wired by
Quad up with the lead w/ the solenoid and fuse on (+) and the other shorter lead on (-) but when I hooked up my charger for a jump I had no electronics, no lights, no dash, not even a click on the starter. The battery read 2V and it is a 12V (I am 90% sure it is a 9BS on a 05 TRX250EX) I used my multi to resistance test both leads the one with the fuse read OL(Overload) and the other made the multi beep and had a high reading. My multi is a Fluke clamp meter in case that matters. I did electronics a long while ago and my memory is old so I just need some reminders on how I messed up 🙂