This what comes out of the big box on the roof rack of your SUV...
Step 1: Sort It, Before It Sorts You!
Borrow a muffin bake tray from the kitchen. (put it back later)
with this aid, you can A. check that all the bits are there in correct number, size etc. and B. keep them safe until the instruction sheet tells you to use them. You do use the sheet, yes??