Nothing fancy - just a bunch of SMA connectors for cables from the Red Pitaya, and a selectable impedance. available values are: 100 Ohms, 1K, 10K, and 100K. Of course, if you wanted to put in different load resistors you can - it just means the text on the panel would need to change.
The whole thing is designed to fit inside a Tic Tac box: see attached picture.
