Driver Wiring

I’ve got a momentary Qlite coming from RMM and am not clear as to the wiring. I’m not a total noob, know what a pill is and how a clicky circuit works in a light. The momentary switch I need, due to physical dimensions, won’t handle the full amps to the driver. It needs to be wired only for signaling the ATtiny chip that it’s time to change modes. B+ and B- obviously have to go straight from battery to driver, but any incite on how the momentary switch is wired in? BTW, yes this is for a lantern, so no pill or grounding through the housing like a flashlight. Thanks!

One side of the momentary switch is connected to the MCU Pin #2, and the other end to ground.

Thank you Pilot! Straight to what I needed.