Acrylic In Back Filter Help

[fishtale]

I have recently bougt a used 80 gallon acrylic fish tank and I beleive I am missing some parts? I was wondering if anyone can help. I am looking for a power head to go for the tank that I have. I purchased one that doesn't seem to fit. I have included a couple of pictures that I hope can explain what I am talking about.

Below is a picture of the tank.

http/www.flickr.com/photos/41416294@N00/831937219/

It has filtration in the back of it. I am looking for the part that connects to the next picture...
http/www.flickr.com/photos/41416294@N00/831937245/

If anyone has a clue as to where I could purchase this part I would truly appreciate the help.

Lastly I have a Fluval 405 that I plan on using with the tank, I was told by someone that I should hook up both the intake and outtake at the same location as the pump I am looking for? Does this sound right or does anyone have any other suggestions?

Thanks in advance to anyone that can help....

 

[rdd1952]

I can't help with the pump but you might want to also post in the hardware section so see if anyone there can help. (Not much help but at least this will bump you back to the top)