I purchased a center instrument/switch panel a while ago, probably from a Mk2 sedan. The switches were all loose and not in their original positions so I don’t know which one is which. I think these two three position switches are wiper or panel lighting, but I could be wrong and they aren’t either.
This is the centre panel from a 420, so pretty similar if not identical. Large left switch is wiper 2nd from right is 3 position. I don’t think there’s anything there with the same pin layout as yours.
Your panel appears to have come from a MK2. The switch with the resistors on it is the panel light switch and belongs in the 8th position. The other switch is the heater fan switch and belongs in the 7th position. As Kevin’s picture showed, the wiper switch is huge. If you had one it would go in the 2nd position, but yours is missing. Of the two-position switches that are mounted on your panel, the momentary one is for the windshield washer, and belongs in the first position. The other two are for the map light in position 3 and the interior light in position 9. The IVR should be mounted between the two studs that are between and above the Water and Oil gauges.
Yes, the resistor bank is for the dimming position for the panel lights, so it will get a bit warm. The annoying thing about this, for me, is that the standard panel lighting level on my S is already what I would call ‘dim’ and dimming further seems pointless.