What are the empty bolt holes on the left side of plug 2 and the right side of plug 6 on a 1995 Grand AM 3.1 engine?

I'm not familiar with the grand am but I do own a 3.1L Pontiac engine.I believe the holes you are referring to are there in order to attach the brackets required to hoist the engine out of the engine compartment.

If you are talking about the empty bolt holes on the head by plug 2 and plug 6 the head is universal. If that head was used on the other side it would be for the coil bracket that's on the other side of the motor.