This support plate can be used for add-on parts thats require a straight support surface.

The support plate is simply clicked on between the attachment and te profile.

Then add-on parts, such as hinges, will be simply screwed with the plate on te profile. 

Support plate from black plastic.

Dimension for the support plate on the NGP40 : 49x32mm

Dimension for the support plate on the NGP60 : 49x50mm