After SalesTechnical DocumentationRAE/RAK–1NCARK60 Installation GuidePage 8 Original, 08/964) Once the desired position has been obtained ensure that all the screwsare fastened securely.Fixed mountingplateSwivel bodySwivel bodyFixed mountingplateFigure 3. Swivel Mounted Fixing KitJunction Box HFJ–3The Hands–Free Junction Box provides and controls the supply voltagesfor the accessories and charging current for your Communicator. Inaddition, it controls the audio paths to accessories and hands–freeequipment. The jack marked HANDSET/ACCESSORY is reserved for theoptional handset.Hands–Free Microphone HFM–10 and Speaker HFS–6The Hands–Free Microphone connects directly to the Junction Box MICjack and Hands–Free Speaker to the SPEAKER jack.Power Cable PCH–4The Power Cable connects to the Junction Box via the 4 pin connector.The red (+12 V) and black (GND) wires connect to the battery via thesupplied fused connectors. The yellow (XCRM) wire is for car radio muteand the blue (IGNS) wire is for ignition sense. The XCRM line goes downto 0 volts during a call. The maximum sink current is 250 mA (see“Installation; Car Radio Muting”). The IGNS line is connected to a +12 Vvoltage source, controlled by the Car Ignition Key. The Ignition Sense canutilize voltages up to 24 V (see “ Installation; Ignition Sense”).Handset HSU–1 (optional)An optional Handset offers more privacy during a call. The Holder isattached by screwing the Mounting Plate provided to the vehicle andsliding the Holder into place.