system for '89 Regal

I just bought some subs and an amp fr my 89. I have everything hooked up except for the wire to the head unit. I cannot figure out how I should go about fixing it. There is no place in the head unit for the plugs to go. Has anyone else had this problem? If so, can you please help?

You'll have to find out which wire going to the radio is the switched accessory lead and splice into it. I did the same thing with a stock Saturn radio and had no problems.