The two "push on" flag terminals for the neutral switch and the start wire are blue, AKA up to no14. (Actually I guess you could use red) These vary some brand to brand, and if the wire seems a bit loose, I strip them long, and fold the wire over double before inserting into the terminal
The "square" screw goes to the starter solenoid and I've forgetten, no. 12 or 10 so you want yellow. The wiring to the big stud varies. It is power coming to/ from the battery
Red are for no. 22/ 16
Blue are for no. 16/ 14
Yellow are for no. 12/ 10