1983 ltd crown vic

Im wiring my alarm system.
I have everything hooked up except the trunk release. I want to know where is the relay the the trunk release

No relay, the decklid solenoid should be on the decklid latch. With an alarm system, you may have to install a relay to pull signal off the release wire or to trigger it from a remote entry system as the solenoid is a 7-10 amp draw if I remember right. More than most of the alarm/entry boxes can pass without a relay