Emergency Brake Warning Light

[jacks71c10]

Trying to get my 71 C10 to pass VA safety inspection and inspector is telling me the brake light in the dash must illuminate when the e-brake is depressed. I crawled under the dash and don't see a switch there, nor do I see any previous wiring that would lead me to believe there ever was one. New to this state and hate it already! Can anyone tell me if my truck came with this switch and if so, where do I find one? Searched LMC for it and could not find it either? Appreciate any assistance! New here and new to the 67-72 C10s, but not new to older cars. Thanks!