you are right the plexiglass goes inside the grab bar,that way i did not have to bend it.I fastenedPG to grabbar with 2 u bolts.</P>
Used rotozip to cut out square for dump control lock, dump lever right inside almost against PG,doesn't bother diff lock.Fastened a piece of square rubber piece as a flap to cover hole. To bend Plexiglass for windshield figure size you want ,mine is 49"wide x 36" tall since sheet comes in 36"x72".only had to cut once.clamp at bottom of Ropes with 2 c-clamps and where Ropes bends heat plexiglass with a torch.I used a cutting torch set low. Probably a propane torch would do also.Continually move torch back and forth across PG in line with bend inRopes.Do not letflame stay in one place.Pushing at top so that it folds and follows frame when hot enough.Hold in position or clamp at top untill cools. If you get too hot will cause bubbling to take place.I practiced on a small piece beforehand. After it cooled.I heated and bent top to followtop pipes of the Ropes. Did the samewith roof followed the contour of Ropes. Hopes this helps you.</P>