On the flat side of the lens. You will be ok.Since lots of people are replacing their interior lights with #168 LED's, maybe someone else has had the same problems as me: 1. On the pair of reading or map lights, the new LED bulb is not recessed as much as the original; this makes it impossible to depress the plastic cover and by doing so turn on the white button. And 2. Where on the dome light did you insert your pry tool to avoid cracking the plastic cap? Mine is really tight.
Thanks for any help you can offer.