Nitrous plumbing A1A...??..

I guess my thought was I could just arm the switch and at any time test the retard by tapping the shifter button without being full throttle and being able to know the timing retard was working correctly even at idle as it would idle down..
I did just use a piggyback clip with the timing retard activation wire and could move that on the other side of the full throttle switch and very close to the operation of the nitrous solenoid?..
And still with the low pressure switch jumped and the fuel pump not activated and the bottle not open and the system fully purged I could have someone trip the trigger while I trip the full throttle trigger to test the timing retard operation...