Vehicle: 1985 300D

The light(s) that illuminate the top four switches on my center console (courtesy light, antenna, rear defrost, and sunroof) do not light up the switches. I attempted to take out my dash and when I couldn't get it disconnected from the center console, I just put the whole thing back together. I'm thinking that when I was pulling the dash and it was moving the center console, I accidentally disconnected the light or lights that illuminate these 4 switches. The defrost switch will light up as its supposed to when I turn the switch on, but all 4 of these switches should be dimly lit as soon as I turn on my headlights.

My question is: Are these lit up via a light or lights behind the switches deep in the dash or are they lit up at the switch itself (i.e, an LED is in the switch)?

Thanks,

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FrankieZ
84 500SEL EURO 87K
85 300D 267K (and still goin' strong)