ok so took the clip connection off the passenger-side float sender unit, under the back seat. These are the pics showing.
Now unplug the connector off the fuel pump/sender and do fuel levels again, that will determine which side it is.
I will do that now.Lift out the RHS (drivers side) unit, that houses the fuel filter, and check the black and green wires that connect to the other unit. They are very fiddly to lift out, just keep tilting and turning it slightly. Be careful of bending or damaging the float, it can be lifted up enough to check the wires.
come back to you soon.