I also recommend rotating the rear shock 180 degrees so that the shock reservoir rests on the left side of the bike instead of the right.
Stock location before rotation
after rotation
this will allow you to put the shock reservoir next to the battery and out of the way.
I also had to modify/shorten the other metal bracket so it would fit.
Here is a few pictures of what the tail section looks like with everything put together.
I had to make an extension out of steel for this ground wire
Now that everything fits you can put your seat on if you went with the first option for the seat rails. If you did what I did than you will have to add a tab for the seat like the Ss seat has so the front of the seat will lay flush with the tank.
S seat left, Ss seat right