O2 Sensor Fuse Wiring Diagram

I have scoured the internet and cannot find the wiring diagrams for the harnesses plugged into the fuse panel on the passenger side of the engine compartment
The 15a fuse 54 for the O2 sensors keeps shorting out and I have been trying to track it down for what feels like forever

2007 Xterra Off Road

I found one grounded wire on each of the two downstream sensor connectors and no ground connected wire for the upstream sensor connectors
I then found the lower section of the 15a fuse is going to ground
I then unplugged the upper 16pin harness and found the fuse was no longer going to ground
I then found two wires on the 16 pin connector (red, and yellow) going to ground

I need a wiring diagram for that harness to find out where in those wires are going so I can either repair the short or run a new wire