93 fleetwood

hey guys i just pulled a 1993 cadillac fleetwood into my shop got the stereo out an realized the wiring kit my metra book called for (standerd early 90's gm 70-1858)wasn't going to fit and the factory head unit has no antenna jack i assume ther is a wiring junction somewhere in the dash but after droping the lower pannels and searching i couldn't find anything if anyone knows anything about these cars any help would be highly appreciated thanks .   you will still be here tomorrow but your dreams may not.

There has to be a separate tuner/amp pack, then; similar to the '88-94 GM full-size trucks. Once you get to the tuner/amp pack, there will be a male 1858 and antenna plug---just stretch them to the radio location and plug your adaptors in. I don't know where the tuner pack will be on that car, but on the '90-92 Brougham, it was behind the dash, in the area roughly between the steering column and the radio. I'd start by looking there.