Cyclone 10 GXB Transceiver EMC Output Termination

Hi,

In my cyclone 10 GX FPGA design, I have the GXB transceivers constantly transmitting pseudo random signal pattern. In one of the board assemblies some of the TX outputs channels of the transceiver will remain unconnected. I would like to terminate those outputs to reduce EMC interference. What is the recommended termination for those?