Crrrraaap.
I don't recall certain bolts/certain locations, but it's worth a try.
On mine, I just loosened the bolts a bit, pried with a large screwdriver to hold the cover "up", then re-tightened the bolts. Probably grunted 'em to about 20 ft/lbs or so, didn't measure.
DS will always feel "locked" with car in gear, if I understand you correctly.
Have you adjusted the shifter, and were you using it to change gears? Does it have the correct forks & detents in it? Are the levers & rods installed correctly (not contacting/binding each other)?