Lay the frame out on the floor in the boatyard.
First find the ridge pieces (these are the top of the frame and run from bow to stern)
Then by a process of elimination identify each of the inverted V frame pieces, probably about 5 or 6 of them. Smaller ones tend to be at the bow and stern.
When you get it right mark each one with numbers and bow, stern, port, starboard with a permanent marker.
Check each of the set screws. I use a little squirt of WD40 to stop them seizing.
I also superlube the pivot points of the frame.
The frame should go OVER the
lifelines and then sit INSIDE the toe rail.
Start there and see how you do, there is also a little paper manual that might help.