95 obd1

95 Aurora, engine light comes on .
I looked under the dashboard and can't seem to locate the plug for the reader.
ALSO how do I read codes out of an OBD1??

Hello??
Can you help me locate the OBD1 plug
There is a large plastic cover under the stering column and NO plug.
I have other cars and know where it's supposed to be. Did Olds hide it in a different location??

Please help

And if I ever find it,, what is the procedure to read OBD1's