yep, look at your diagram, no; look at your tensioner pulley, attach to it is the tensioner,,,round rubber, etc. There should be a big #$# nut in the center of it. If you have a cap there, I'm sure there's a nut. Granted, your car is not the same as mine but it's around the same year.

You got to loosen that nut about 1/2 turn. 19MM big nut and hard to turn, i use a pipe extension and it's real easy then. I do this from under the car. Once that nut is loose, then loosen the adjusting screw 13mm enough to get belt off.
Caution; read manual and notice where your "pointer is" that's where you want to get to after belt replacement.

1. 19mm- first
2. 13mm -second

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JHaburay

1972 280se 4.5 "princess"
1986 2.3-16v first 100 (099) USA