MSD Box wiring

So I searched and didn't come up with anything, I'm trying to wire my msd box so I can start my car with my key and not a screw driver on my starter relay, Does anyone know where I need to tap into? I had it tapped into a spot on the driver side fire wall, a small regtanular selonoid with 2 connecters for wires to go on, and it works but I think the voltage drop after initial start turns my msd box off for saftey reasons. any help would be greatfull.

I'm running MSD 6aL, MSD Coil and MSD distributor.

Thanks in advance
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