Welcome onboard.
Sounds like VSS (vehicle speed sensor) which advises atx/engine and speedo of speed, accessible on exterior of transmission. I thought '95 models had mechanical speedos although that may only be v6 models, I note you have I4 (timing belt).
98 Mystique LS v6 atx 110,000km
97 Contour LX v6 atx 125,000km
stock CD on LS, cass on LX
spoiler, tinted windows on LS only
4 wheel discs on LX only
All other available options on both
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