Welp, I got it all hooked up, but it wasn't easy. I did not have any screwdriver that could remove the weird 6-pointed star style screws that held the connectors in. The best I could do was cut the openings in the metal shield a little wider (using a Dremel). This allowed the two connectors on the network adaptor to be moveable as far apart as possible.
Even though I did this, I really had to apply alot of physical force to keep them as far apart as possible, and then the WD drive had to be inserted perfectly straight. If it went into one connector first, at a slight angle, then it just wouldn't line up with the other connector. Took alot of effort, but eventuall, it went in!
YAY!