Part identification needed

I am in the process of repairing/rebuilding the wiring harnesses on my ’64 Barracuda. Need help identifying this part. It is part of the body wiring harness (wiring in the trunk) and is located just forward of the jack. It appears to be molded over the wires and is part of the wiring loom. What is it? What does it do? Is it necessary? Is a replacement available? Any help will be greatly appreciated.

Thanks, Ken

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Ken! What I know of that tab is located on the body wiring harness that goes from the connection beside the hi/lo beam switch on the floor to the lamps at the back of the car. Like Dana67Dart said, it's a tab to hook up the wiring harness on the left side of the truck. You will find a special metal tag there to hold the wiring in place.