After some more reading I've discovered that there is an adapter harness that appears to bridge between the 96-99 climate control unit and the factory 95 harness. Looks like you have the 96-99 unit. The 95 units sold today are just a 96-99 unit with the harness attached. Yours doesn't appear to have the harness.
Trying to locate the harness without the unit is difficult. I don't believe they sell just the harness any longer. You may be able to find a used one.
Looks like the options are
1. Find a used harness.
2. Buy the "95" unit which is actually the 96-99 unit with the harness attached. Link below. Notice the harness attched in the pics.