Pic below shows the ram in place and compressed along the inner wing. The wing is marked, bonnet closed and bonnet marked where the paint mark was put on the inner wing.
This gives the mounting hole point of the upper bracket and the rest is handy enough.
In the picture below you can see where the center mark is on the Bonnet, the top bracket is then set in place and the holes marked , drilled and alloy rivnuts inserted.
With both sides done and tested that they were working exactly the same the brackets were removed and painted before the final fit below.
The Piston rams are called Nitrolift, there website is http://www.nitroliftsupports.com/
part number GS8-18-210-270