Help me find a power source

I need someone to tell me where to find a hot in run, hot in start power source either in the power block or in the dash area. The wire I was using to power the on / off switch on my MSD box ran through the instrument cluster and when I removed the cluster the power wire went South. You would think that there would be plenty of these wires but testing hasn't found one.

Please don't send me wiring diagrams. I don't read, write or speak electricese. I need a description like... the little red wire next to the big black boxthat runs into the firewall... well you know what I mean.

Thanks