Question regarding pcb wiring and amount of buttons

I want to know if it is required to use ALL of the buttons on a pcb when making a stick. Meaning if I wanted to take apart some logitech usb controller I have laying around, and want to make a 6 button layout and add 1 button somewhere as a start function, would it matter if I left alone the other triggers and select?

This is mainly for PC usage only, but in regards to console, would it matter it’s not picking up a signal from certain buttons?

It doesn’t matter which buttons you wire long as you leave the triggers intact. If you rip them off there’s additional fun (resistors) to be had. An un-soldered point isn’t going to hurt anything.

Great, thank you.