I have an 04 350z that I bought fire damaged. The entire bay was cooked and all the wiring and fuse boxes had to be ripped out, including the body harness which runs underneath the ac lines into the firewall and under the dash. I replaced the body harness with a harness from an 03 z and I thought it would be fine as everything else plugs in okay accept the abs (I normally have it disconnected anyways) however upon further inspection I realized there was one connector that had nowhere to plug in near the BCM and I’m thinking this is probably a major issue. I’ve reference the service manuals and the connector is supposed to be power and ground to the BCM, however the 2004 BCM doesn’t have this connector, so I don’t understand how it’s supposed to get power or ground?
The plug at the bottom of this photo with the red and black is the plug that doesn’t plug in on the 04 bcm

This is a photo of the bcm I have (04)

The service manual for the 03 z says that the connector that isn’t plugged in should be plugged in to the BCM and it is power and ground. (Obviously important) but the 04 z manual doesn’t have this connector, and I have no idea how it is supposed to be getting power and ground so that I can rewire it. I have attached diagrams and photos. Any help is greatly appreciated, I really don’t want to have to find another salvage harness remove as it basically scraps the car and they’re very difficult to remove/install.