Cut the Black Box out by mistake Mercury

***. this guy completely screwed me. he said he knew what he was doing. anyways i am installing a clarion head unit into my 1997 mercury mountaineer. This guy told me i had to cut out the boxes that plugged into the factory head unit. I cut the one out and then we couldnt figure out what to do cause the wires in my car arent the right colors and we dont have a voltometer cause we are at college. So then there is apparently a $5 adapter i could have bought at walmart and i did. so now the black thing needs to go back on. So pretty much i have spent about a week *** with this *** on a project that should have taken 10 minutes total. so im really pissed off and i think i might be completely ******. the black boxes wires are cut really small so i am having extreme trouble getting it back on. idk wtf to do guys? can someone please help me? my aol name is the same as my forum name. thanks