Need a little help

[Dad's69RR]

Hit a minor snag installing new engine harness. Can you guys help, I have before pics of the plug that comes off of the top firewall bulkhead being connected to spliced wires that go to Alternator relay. I purchased a new engine Harness and there is not a branch that connects to this plug? Should there be a separate harness for this?? I think there was some kind of pigtail connected here?
Here are a couple pics showing the plug I am talking about. I cannot find the cobbled harness that I took off and just want to make sure I get connected properly. Thanks for the help.

 

[HT413]

If im not mistaken, that's the reverse light circuit that goes to the neutral safety switch on the tranny.

 

[HawkRod]

If im not mistaken, that's the reverse light circuit that goes to the neutral safety switch on the tranny.

Correct - I just put mine back on last night! It is a two conductor wire that runs along the back of the firewall and then runs down to the driver side of the trans where the two prong "bell" shaped connector plugs in to the transmission.

Classic industries makes these if you need it.

Hawk

 

[Dad's69RR]

Thanks Hawk looking at them right now. My issue will be that the previous owner installed what I believe to be a 70's Hemi 4-Speed so I am confused as what I need to do? Any suggestions?