Okay, then....here's what I suggest: FIRST as for the intake from the tank to the Eheim canister...Look at the bottom-most picture you posted. The inverted "J-tube" you'd use to get the water from the tank to the canister. the shorter part of the "hook" of the J-tube goes goes on the outside of the tank and brings the water down to the canister by way of the green tubing that came with your Eheim canister. BUT, life with the canister will be much easier if you get this:
http://www.bigalsonline.com/edealin...pping+Datafeed&utm_medium=Comparison+Shopping
and put that on the tubing between the J-tube and the canister. With those, you can close them off when you want to clean the medium in the filter and disconnect the canister from the tank to take to the sink to clean it. What a difference it is to have those. You can also find them at
http://www.marinedepot.com/ps_searc...e tap&vendorname=Eheim&vendorcode=EH&parsed=1
NEXT...to hook up the return to the tank: Personally, I don't use the ones that you're considering using. I instead get another J-tube and put the shorter end into the tank. I use a small piece of the Eheim tubing to connect it to a barbed elbow which you can get at any HD or Lowes and then with another piece of short tubing you can connect the spray bar so it can be placed on the back glass of your tank, horizontally. I also suggest that you use a double-tap quick release on the tubing between the return and the out from the canister. That way, both can be disconnected when you want to remove the canister to a sink to clean it out.
A few more suggestions:
1. if you get the double-tap quick releases that I suggested, you have to be sure
that you get the right size that goes with your particular canister's tubing, so
you have to speak to a sales-agent of the vendor that you buy them from to
be certain that you order or buy the right size if you can't figure it out yourself
because Eheim uses a few different sized tubing.
2. when you clean out the Eheim canister, fill it with water before you place it
back on the tank. That way, the siphon action will start on its own and you
won't have any trouble getting it to start up again.
If you need further explanation of any of this, just ask.