Installing a SVT focus Fuel Pump

I am having trouble getting the last connection off the gas tank. It is the connection right under where you pump your gas. There are no bolts visible or connections. Does anyone know any info. Thanks
 
Prdon my ignorance, but what advantage does a Focus fuel pump have over a Mustang fuel pump?? I've heard it mentioned a few times, but I can't see it feeding more to that 2.0 than the pump on our 4.6, right? Or am I just out of the loop on this one??

WES