@Ya Tigor @Venom0852 see if the colors match 7A at the bottom right of the schematic.

Maybe you can get the wire colors on the connectors and look at this schematic and figure out which one it is. Once you know which number the connector is, the Electrical Diagnostic Manual can give the location of the other half.

 

Here is the plug coming off of the relays, 40 fuse, and fuse box. Still can't find plug pretty sure missing rear wiring harness