Simple answer: just use unicable port.
Long answer :
That LNB has both technologies, Unicable/DCSS and Universal LNB. A typical usage is Unicable to several tuners/devices, legacy to Freesat receiver.
Golden rule is tuner config (software) must match the reception equipment (hardware) connected/hooked up/attached to it.
Bother, attachments missing from that thread. I'll see if I can find them again