Hello:
I would like to know to which cable I can connect in which there is power when I turn / move Ignition switch to on/acc position?
Reason being is that I will be connecting the control box of the Agency Power Sleeper Catless Exhaust , and I will only like for it to have Power when the Ignition key is turned on.

PREFERABLY to connect near the rear seats ( where the ECU is located) as there is where I am planning to install the control box.

Pictures will be greatly appreciated..!!