There is an uneasy detente that we as a civilization have reached with screws. Leave them alone, and the world remains intact. Start (un)screwing with them, and everything falls apart. If you're reading this, you're no doubt feeling this truth in a very visceral way. Let the feelings wash like a flowing tide. We're about to set this right.
You unscrewed your cam lever assembly on your tripod leg just a hair too much, and the whole thing fell apart. It's ok. It was assembled once and so shall it be again. Check out this walkthru from Tripod Engineer Wheeler for the step-by-step on how to get your tripod back into service. Soon this will be nothing more than a bad dream.
0:29 - Everything falls apart.
0:47 - The parts of the cam lock assembly.
1:07 - The reassembly process.
2:01 - Use a flathead screwdriver to assist the threading alignment as needed.
2:11 - Retuning the cam to an acceptable holding force (just screw it a little tighter).
And as always, if you have any other questions, send us a love letter sealed with a kiss to firstname.lastname@example.org.