Using Altera's SerialLite to create a high-speed data link between Two or more FPGA's

Hello, I have a question about using the SerialLite MegaCore Function to create a high-speed data link between two or more Stratix FPGA's. I want to know, do I simply tie the two FPGA's TX/RX pins together, or are there any devices that are required to link the two FPGA's together? I've been looking over the SerialLite II MegaCore Function User Guide on page 3-17 they have a Figure that has two FPGA's connected together and I was thinking, is it that simple, just tie the TX & RX lines together?

thanks, joe