1992 Lumina programming/override button?
 

I got an iKeyless remote and there is a "how to" video to program the remote but it isn't specific to my actual car. It lists places I should be able to find this button (on dash, under dash, by parking brake release) to get the car into "program mode" but I haven't had any luck. I bought the car about a month ago and it came with a working remote but have since lost it due to the plastic keyring loop being broken. The internet has so far been no help. Everything I look up starts at 1994. Thank you for any help!