Brackets and track adding
According to the nature of brackets and pathway of the ladder, tag on the information to drill holes for screws for the steel brackets that could easily fit on the track.
Connect the peak fittings with ladder
Trace measuring instructions for fixtures positioning, keep the fixture in the center of the stairs at top of the ladder in order to join the top fixtures.
Attach the base fittings with ladder
Again take a look on instructions in order to measure and perfect fixing the base fixtures with ladder.
Mount the ladder
Now you have to raise the ladder for tracking purpose and clasp the top bracket on track. Now check once again and look for adjustment. Balance the bottom properly so that it could easily roll.