Motor Mounts... UGh!

I am finally getting to put my motor in and I opened that box for my motor mount and I got really concerned. The directions that came with the kit were mixed up, and then it seemed like engine bracket for the driver's side did not even fit... just a big old mess. Please note that I have a slant six K member and the transdapt mounts to put the small block in. Now, I also have the engine brackets from when I bought the small block to match a small block K member. My questions are what is the difference between the various small block engine brackets and how do they mount up to the ears of the block? They either have to go on one side or the other obviously. And, how do you tell which bracket goes to which side?

P.S. Take it easy on me if it is an obvious answer... I am new at this!:???: