I don't know if this will help at all, but it goes a little like this:

Your flip/flop hub has threading on both sides, one for a fixed cog and lockring and the other side for a freewheel.

The fixed side looks like this (this is looking rearward, drive side is left)

__-----[|. the "_" are reverse threading, the "-" are normal right handed threading and "[|" is part of the hub the spokes connect to.

The track cog goes on the "---" and the lockring goes on the "___".

The free side is similar, but it's just

-----[|. again, "-" are right handed threads, and [| is part of the hub the spokes connect to.