Need Help finding power to LS1 Computer

[Outlaw33]

Hi Guys
I'm a bit of a novice, I was wondering what number on the LS1 computer is the power wire or memory power wire, so I can run a direct wire from the computer to the battery. At the moment every time I turn off my battery isolator key the computer looses its memory.
Any Idea where I could find a diagram the would give me the color code or pin layout for the computer.
Thanks for any help

[Mean Green Z28]

What year?

Be careful of this, depending on the circuitry of the pcm, you may end up inadvertently powering everything else that you thought to shut down through the pcm and fry it due to the load through it.