A couple of ways, depending on how you want to set it up. If all you want is a fuge, you can drill a hole into it and with a bulkhead and some minor plumbing, have it
gravity feed down into your tank. This would require putting it above your display tank or in your stand above the sump. You put a small flow PH from your tank into the fuge then the it flows up and spills over, through the bulkhead, back down into your tank.
OR
You might even rig a small PH to pump the water down or up into your tank.
If you want the pods and stuff in your display, gravity feed would be better.
Either way, some plumbing will be required. Complex or simple depends on the design. The hangons are fine, but the size of them really doesn't do much and the pods etc never make it into the tank, though their spawn might.