Unattached wiring harness in trunk - 1968

While checking out my non functioning sequencer, I found this loose wiring harness in my 1968. Any ideas as to what it’s for be appreciated. Thanks!!!

looks like added on trailer wiring to me.

PS i got one of them not functioning sequencers too. Actually, the motor in mine turns and clicks the contacts… so its getting power back there… I just am not getting anything out of the relay apparenlty.