I actually did that with mine. What I wound up doing was unsoldering one of the test switches from the board. Forget which one but it was the one that dumps 4 quarters per push (think it was the left one?) . Then the coin return button already had a micro switch installed for I think something that told the bill acceptor to run backwards for a bit when pushed. So I then just soldered some wires in it's place that i ran up to behind the button where the switch was and hooked it up to that. I left the original wires and just taped off the original connectors and tucked them in the back so if i ever sold it I could convert it back. But it works great. I can get some pics later when I get home from work in a few hours