dummy/fake side marker lights?

[rscam]

I am probably the last person to know this but. I put may markers in my 69 GMC and can't find a harness for the front or rear. I looked at a wiring diagram and it shows a separate harness from the main one under the hood that goes to the bulk head. So I said I will just go to the junkyard and find one on a truck. I found a 68 and looked at the back of the light because I couldn'y find the harness on that truck either. I figured I could start at the light and go backwark till I saw where it went thru the firewall. But the light has no bulb or no hole for a buld. So they are fake. Just reflectors. Would mine have had fake ones also?