Sniper and Trunk Battery help

Cracked back - just looking at your diagram you recently posted I see you now show a CD prior to the Ford solenoid.
That is how I wired in the painless relay. However
the painless relay is CD but they advise installing it it directly in line with feed wire from alternator it is not powered via switched power?
The ST 85 Ford style relay is rated 80 amps and was listed as a stater solenoid it just happens to be continuous duty.