Steering Column/Gauge Cluster Help

I cannot tell from your photo, but here's one possibility

The newer cars don't have the park lights on the old park circuit, because (on my 67) the park lights are NOT on with headlights. All Ma did on the newer cars to hold the park lights on with headlights was to MOVE the park supply wire over to the tail light terminal.

So this will leave on unused terminal on the switch.