I'm hoping one of you electrically inclined types can help me out here. I'm in the process if installing a VIAIR on-board-air system in my rig and thought about adding an electronically controlled purge valve to the system for 5h!ts and giggles. I'm planning to use this momentary switch to activate the valve and I'm not sure which terminal is what. Any chance somebody out there can lend a hand in explaining which wires go where? I believe the outer two posts marked + and - are for the switch illumination. Center terminals are labeled NC, NO and C. I am not well versed in wiring and electronics so I have no clue what these mean, but I can follow instructions. Thanks in advance.