Geez, the things you learn about when it's already too late. Wish I'd known that these things exist when I restored my 2T1A. Engine is upright but totally enclosed within the cowl, had a bear of a time figuring out how to power it. Ended up tearing apart an old Cox .049 plug connector (got a half-dozen of them) and used the top clip on the plug, then a wire from the engine mount bolts - both going to flat copper leads that I use alligator clips to go to the battery.

This critter would have saved me several night's sleep.

Dave

Sorry 'bout da fuzzy pic but it shows the two flat tabs I connect to, in the circle.