Question?
New camera accessory kit has a cable with BNC, what's it for?
https://www.vicon-security.com/wp-content/uploads/2020/08/V2000D-Dome-Series_Datasheet1.pdf
Controls and Connectors Connectors: Two 3/4” conduit access holes provided, side and bottom for internal cable termination. Power: 12 VDC/24 VAC: terminal block; PoE/Network: RJ-45 CAT 5; Alarm: terminal block. Audio: terminal block. Reset button; Default button; Micro SD card slot for SDHC/SDXC card (128 G max; customer-supplied); Video Output; 2-pin terminal block for Monitor Out (5 MP/8 MP models only)
and
https://www.vicon-security.com/wp-content/uploads/2022/01/V2000D-Dome-series_QuickGuide-05.pdf