Silvercrest SLNB 401 A1 - Manual (Page 58)

Universal Quad LNB SLNB 401 A1
56 - English
Mounting
Prior to installing the LNB, unplug any devices from the mains that
belong to the satellite system.
Mount the Universal Quad LNB vertically on your satellite antenna so that
the four outputs (2) face downwards. For this, your satellite antenna must
have a LNB holder with 40 mm of diameter.
For information on how to mount and orientate your satellite antenna,
please refer to the documentation accompanying your satellite antenna.