How determine if control variables moderate the IV/DV relationship in SPSS?!?!

I just finished basic SPSS analysis of data I recently collected that has 1 DV, 2 IVs, and 8 control variables (age, race, level of education, etc).

I cannot for the life of me figure out how to test the control variables for moderation in SPSS.

I feel like I recently did it, but cannot find notes of how I conducted the analysis last time.

Any help is appreciated- this is for my dissertation!!