I've been having trouble with the wireless connection to my printer, so I'm trying to make a wired connection. The instructions say to just insert a USB cable or an ethernet cable (Cat 5, I assume) to the printer under the scanner. My router takes only ethernet cables, so I'm using that. But the cable sockets in the printer are too small for a Cat 5 connector; they seem more like phone line sockets. How can I make a wired connection from the printer to my router?