help with LNB unicable

i got DM920 fbc s2x

i still have normal setup without the benefits of FBC
i have 3 satellite(nilesat, eutelsat,hotbird)
do i need 3 unicable lnb?
one cable should go to receiver? or the 2 lnb 1 and lnb 2 should be connected?



what model of unicable lnb should i get? the one with 1 port ?or multiple?
please help me with the setup