GImix Ghost Video Board

Hoping someone might be able to help me on this. I got a Gimix Ghost SS50 video board today and was trying to find a manual. I'm sure these were used in Gimix's own ghost systems but the very limited info I've come across out there suggests they may have worked with any SS50 system. It basically provides a direct composite video feed out from the computer, I assume bypassing the need for a terminal. I plugged it in and fired it up on my SWTPC 6800 and it is working - I think - it generates a full screen of readable random characters. However it does not put up anything from the computer - that still goes out via terminal. I'm assuming Ghost systems were wired up somehow to use this.. I'm hoping to find a manual that explains how. I don't see a keyboard interface for it anywhere so maybe this went along as a complete Ghost system with hardware I don't have. Thanks if you have anything!