connector 263 is pre inertia switch and may just be the right area for a drop to exist.
connector c392 is the main connector to the inertia switch so to translate what is going on for you is this. The dg/yellow wire is the input wire from the relay and the pink/black is the output to the fuel pump.
here is the the locations and views.
Connector LocationsView 151-23
Connector LocationsView 151-25