The only place I could find on my '95 Mystique was through the wiper grill.
I originally tried the "teardrop" hole that most people talk about, but it had 2 cables running through it, and I could not get a wire through.
Anyway, if you remove the grill using a torx wrench (the star-shaped screw heads) then there should be one hole to access that grill space from the engine, and another hole to get from the space to the passenger compartment. I poked a hole through the rubber seal, and pushed back until I made a hole in the insulation. I then pushed my wire through both holes (can be tricky to blindly find that 2nd hole unless you use a thick wire) and then was able to see the wire from above the brake pedal area. Use a red colored wire and use a flaslight and you'll see it if it went through!
I hope this helps!
