Fuel pump relay

I have a 1991 Nissan Pathfinder/Terrano with Z24 petrol engine

Plan to add in a fuel pump cut-out  hidden switch as an anti-theft measure. Anyone know where is the fuel pump relay ?

What about the related wire harness ? where would be the best location to cut the circuit for my hidden switch ?

Have done a search, but seems that none covers the fuel pump harness. Would be great if someone has the wiring details.

Any info available is very much appreciated.

There is no fusebox found under the hood.

I did tried to take a look at the fusebox under the driver's meter panel. Not so easy to access those bunch of wires hiding underneath. A few relays were also found inside the panel next to the tail light. Not sure for what exact functions.

Open up the cover for the in-tank fuel pump. It has 4 wires connection there.  1 or 2 are used for the fuel gauge, i believe. Not sure it has single or dual flow rate pump. Any idea ?

Might need to spend a weekend searching for the right wires/relay  if no information is readily available here.