[DonRotolo]

FYI, and oh and NC on the switch stand for normally open and normally closed. A normally open switch has no continuity when the switch is not depressed, I'll normally closed switch does.

You want to wire one side of the switch to ground on a digital input of the digital sidecar, and the other side to the signal connection. So that when the switches actuated the digital I/O pin senses whether there is ground or not. that can be used in your program to tell whether the switch has been pressed or not.