The SCART is not an input. The HD/HDR-FOX has no circuitry that would allow it to accept analogue video input.
The HDR-FOX is a Freeview/FreeviewHD receiver/recorder. The HD-FOX is a receiver (with recording capability as an add-on). As input they take a UHF aerial feed; as output they have a UHF pass-through, HDMI, SCART (selectable RGB/composite), phono (stereo audio + composite video), and TOS-link (digital audio by optical fibre). As a recorder they can only capture the incoming Freeview data.