Digital tv-tuner to command??


We found open MOST slots from Star, but didn't figure out how we should open em. There was open slots from 6 to 14. What slot has to be opened for my tuner, if my box input is installed to wire from headunits output and box output is connected to former cable from headunit output.
Is there anything else what has to be done after this MOST slot opening?
Thanks for advance



