https://lmr.com/item/LRS-8693NSM/T5-Back-Up-Light-Connector-With-Pigail-Mustang-83-04 You can modify your harness to add this to it, if you don't mind wiring. VSS is a reused connector that just plugs right in with either harness. I made an excel sheet wiring diagram for it.
Pm me an email address I'll hook ya up. I bought a manual harness that was a botched auto. So i had to learn the hard way lol