You’re all finished, have fun with the guitar strap! Put the AA batteries into the inverter, and turn off the lights.
A few things to consider are that you might have some excess wire, depending on the intricacies of your designs, so I decided to outline a guitar with my excess chasing wire. If you don’t want to do this you can simply cut the excess wire.
Also, when you’re playing with the guitar strap on, keep the inverter away from the pickups of the guitar. The inverter emits a small buzzing noise, which is completely normal, but the guitar will actually pick up that noise and cause feedback if the inverter is too close to the pickups.
I solved this by putting the inverter in my left pocket, which keeps it completely away from the pickups.