Tohatsu wiring and trollmasterpro 3

[rolmops]

I installed a little remote control servo ( trollmaster pro 3) on my 2020 9.9 tohatsu and it works well, but not great.The troll master unit has a wire that is to be connected to a switched positive wire so there is no battery drainage when when the little engine is shut off. It makes no sense to me to connect it to the main engine switched power because I intend to shut off the main engine when trolling. My question is what color wire on the kicker engine should I connect this wire to?
Thank you for your advice.

 

[rolmops]

Sorry I forgot to mention that the tohatsu has a side mounted remote cable control with electric key switch starter.