All of the batteries will fit without issue. You are missing the tie down.
#4, #5, #20
Now, the side posts.
The side posts are a different type of terminal.
This diagram is from a Corvette because it is the only car I happen to remember using side posts that I had. Now, side posts can be used with the top posts side by side and if you have many extra electrical components, it can make it look a lot cleaner. However, for the route you are going (plug, play, and forget), you can get away with using this one and you will probably be in best shape. That's what I would do.
http://www.optimabatteries.com/en-us/shop/yellowtop/optima-batteries-8012-021-d34-yellowtop-starting-and-deep-cycle-battery/
The reason I was saying if you want the side posts, I would get the side posts on the outside because I wouldn't want the positive terminal being that close to a ground, the tie down in this case, without proper insulation. It could cause a short.