Probably best not to draw power through the 5 ohm resistor. Del mentioned that earlier. It would prob work but why risk it.
Just connect that Mallory On wire to any convenient spot in the ignition circuit. The ring terminal is a minor pain to connect without a terminal strip but you could do it. I just did that for my tachometer wire.
Lemme look, don't think I took a pic.
Well I did! Converted the ring terminal to a tab like this. Then covered the bolt with shrink tubing.
No pic of that. LOL