dan i would hope you figured out where the drive shaft goes
The big o rings are for the battery hold down, small for the outdrives.
You are correct on the stock shock mountings.
the shims and 2 spacers i am not sure because i never used the LST shocks.
In the blue, the washer is a spare, The other 2 mounts are used to hold the skid plate on. (you may have got extras it you already used all the holes.)