It's simple to adjust. Just jack up the car. In the exhaust tunnel you will see a rod coming out from the heat shield that goes back to the shifter box. At the front end of the rod it will go through a bushing and there will be a clamp at the end of the rod. Loosen the bolt on the clamp completely loose, put the shifter in reverse and manually shift the tranny into reverse. Then tighten the clamp.
You might have to play around a bit to get the alignment right. Also, it will take a few minutes to find reverse on the tranny. I can't remember of the top of my head which side you have the move the linkage but I "think" it's all the way to the driver's side and back. Remember, its a 4 x 2 gear pattern (R,1,3,5) x (2,4) so reverse will be in the 4 gear line. I am making this sound more complicated than it should be. You'll figure it out.