If you want to connect 2 PC's to the Internet via Homeplug you essentially need 3 Homeplugs. One is plugged into the mains socket and connects via LAN (Ethernet) cable to the Router and becomes the source for the PC's. Each PC then needs a Homeplug connected to the mains and also the PC by a LAN cable. I'm confused by what you are trying to achieve at the moment. Normally you connect the PC next to the Router directly to the Router without using a Homeplug, the Homeplug next to the Router acts as the Broadcaster for any other Homeplugs on the same circuit, these are essentially Receivers.