Under cab and sleeper marker lights switch question For 379/389

I need to know out of curiosity more then anything else what switch curcuit are these wired on from the factory since I’ve never sat in anything newer then one of the last year made no frills day cab 379.

I am working on a ‘71 359 that has a set of custom made chicken light strips to fit the old Unilite cab and the po had them along with the lights that are vertical on the newer set of ss air filter cans wired to the parking light switch.

These old 1954-72 Petes had a separate marker switch that ran the two side markers on fenders ( ‘68 on up ), the 5 on cab, and 2 tails. It was also the black wire on trailer for the clearance lights. The park switch was for the two little lights on top of headlights facing forward if single headlights or the turn signal marker light (lolly pop style) on fender if the optional 2 headlight pod was used. It was also the brown wire on trailer circuit for tail lights.
The headlight switch was headlights only back then.

Needless to say its been fubared. This truck has been wired sometime in its life were the marker switch is the front of truck only from top of cab forward and the park switch is the chicken lights in question under the cab. The tailights are another switch that has been added and that includes the trailer pigtail. Sighhhh!

After I get everything else squared away I’m going to wire the chicken lights back in and will most likely just put them on their own switch.

But how does Pete do it.?