Go to any auto or boating store, look in the electrical isle, you'll find them in there. Your better off at a marine store, Anchor is the company that makes all the ring terminals in various wire and screw hole sizes. Just solder them on as normal, and don't forget to use the silver solder and not the rosin core 60/40 for electrical connections. BTW- the waco looks great and how long has it been since you started it, I lost intrest three times and dragged it out over a year.