Ok, I'm wondering if this is possible. I was thinking that in addition to running the ignition wire to the 12V sensing input on my Opus, I would also split the power wire running from my battery so that it also connects into the opus sensing input. At this point, my opus would always run, but what I'd like to do is wire a switch so that it can open and close the spliced wire that feeds off my power wire. This way when my car is turned off I would just push a button or flip a switch to close the spliced wire so the opus still senses 12V.
Assuming the above is possible, can I use any type of button for this or will I need a switch type? Lastly, is there any place that shows how to wire a 12V switch?