i don't think your 6-way switch is a PRC5410 (Defender) , ISTR they have 1/4" Lucar blades - that switch is probably a Series that had screw -tag terminals (as S3) , also there are indications it is a S2A 'keyswitch type' , the wiring is modified with these tags & insulation sleeve. IIRC the switch internal/external tracks are same regardless of model. IIRC the early S2A keys-barrel witch also had 1/4" Lucars.
You could do a repair using Araldite epoxy (original slow set) - however you are trusting to luck.
If you find www. Land-Rover-Lightweight website , wiring diagrams , find the IR diagram - to right hand side you will find a 'truth-table' to check for correct operation , using terminal numbers and a AVO / test lamp.