I believe I can answer your original question on splitting wires.
Neg wire that has to go to two solder places via CFX v10 manual/diagram. You want to split a single 22 wire into two very thin counted strands for each of the two solder points if I'm understanding correctly. You want to split a 22 into a split-off and count the thin strands for each split-off. That would be way too thin and fragile and wont handle the current/amps.
What you want to do is solder two pieces of 22 to the 22 you were thinking of splicing in half. You'd be making a "Y" and every wire will be 22. Wire shrink the connection. Or, solder the 22 to the 1st pad and then solder a jumper to the 2nd.