78 SERIES TROOPY HANDBRAKE LIGHT NOT COMING ON

Hello all,

Only just noticed my handbrake light on the dash does not come on when applying the handbrake, so first thing is to check the switch. Well, the switch is there but no wires connecting to it. Spent a little over an hour trying to find the wire to re-connect the switch but cant seem to locate it anywhere. Places I checked, under the car, around the gearbox under the vinyl flooring but cant seem to locate it. I think the previous owner had changed the vinyl flooring and possibly forgot to re-connect the loom. Any ideas where it could be? And where it connects to the main wire harness in case it has been stripped or removed.

All ideas welcome, thank you