Wats up Everyone,

I have installed 2 visor monitors and 2 headrest monitor is my buddies Box, but I was wondering if I should hook them all up to the ignition. I have the video amplifier going to the ignition, but was worrying about runnig all four screens to the ignition.

The way I have them hooked up is direct power from the battery, of course with inline fuses. Mostly I just want to know if any damage will be done to the ignition switch if I add the monitors to the vid amplifier that is already there.

I know in my car I have my xm radio, amp, power inverter going to the ignition, but for the amp this isn't a the primary power source. and it does take a couple of seconds before my amp turns off.
Would appreciate any help.