The one that is rectangular has 12v, ground, amp turn-on lead and the speaker outputs from the amp. To bypass the amp, just pull it right out, so you have a little more room to work. I ran the speaker wire from the head unit right into that rectangular plug (in their appropriate location). You plug it into the adapter, which is currently plugged into the amp.


Make sense??

1999 Mystique LS V6 Alpine CDA-9807, Rear deck sub, Opt. TB, K&N RU-3530/MAF adaptor, custom heatshield, FSVT 17's, SCT 4-program chip, Eibach's/ST200's, Hella Fogs...