Maztech FCS-To-LRF Cable 20in Black MZT006-20-S-BLK. The X4 FCS-to-LRF Cable connects from the Hotshoe on the X4-FCS to the I/O Accessory Port on the X4-LRF. The I/O Accessory Port remains available on the X4-FCS for either the X4 Rail-Mounted...