I am in the process of wiring (American Auto Wire) my 51 Chevy truck and the next bag tells me to wire the dome light to the door post button. I don't have a door post button. However after thinking about it I might like to have that option on a dark night. Has anyone here added one to their project? If so how did it work out?

I have decided to add a door jam button on both doors. I dropped by NAPA today and looked through their catalog of door jam buttons. I think the one I need will be one that I can just push into a hole I drill in the door post. I'm thinking it should be very flat at the post so the door will shut as it is suppose to.
Does anyone have a suggestion on drilling the hole for the button? Any warnings etc.?