I also added reinforcement framing going from the pivot point to the top section. I added glass to the top section before adding the square tubing. Used construction adhesive to affix the tubing to the underside of the rear hatch and also the adhesive provided a good transition from the metal to the hatch for the fiberglass I added over the tubing, pics can explain better than typing, when the hatch is closed the added support tubing lines up pretty close with the frame members going down to the pivot point.
Click image for larger version. 

Name:	20190601_142357.jpg 
Views:	7 
Size:	89.0 KB 
ID:	1190Click image for larger version. 

Name:	20190601_142403.jpg 
Views:	6 
Size:	95.2 KB 
ID:	1191Click image for larger version. 

Name:	20190604_181205.jpg 
Views:	5 
Size:	95.2 KB 
ID:	1192Click image for larger version. 

Name:	20190605_192423.jpg 
Views:	6 
Size:	89.3 KB 
ID:	1193Click image for larger version. 

Name:	20190607_231538.jpg 
Views:	7 
Size:	93.5 KB 
ID:	1194Click image for larger version. 

Name:	20190614_185229.jpg 
Views:	6 
Size:	89.4 KB 
ID:	1195Click image for larger version. 

Name:	IMG_20201025_200426830.jpg 
Views:	6 
Size:	92.1 KB 
ID:	1196