Part of OBD1 port is missing

[_jonah]

Hello, I am new to this forums and my dad suggested I ask the internet for help. I have a 1993 Acura Vigor LS and am trying to do some engine code diagnostics. The check engine light only turns on periodically and doesn't turn back on when I restart the car (until something happens). I have located part of the OBD1 port to be under the dash of the passenger side though I can only find the three-pin connector. A also need to find the two-pin connecter that I need to trip for the engine codes to be displayed. From various YouTube videos and my Haynes manual, it is depicted to be attached to the three-pin port. Thank you for any help, Jonah.