The rear panel connectors of the ABM350 pro4 board indeed have connectors for video output.
This motherboard supports onboard graphics, but when a dedicated graphics card is installed as you have done the onboard (rear panel motherboard connectors are disabled by the bios. There should be no reason why you should want to use both the graphics card and motherboard connectors at the same time anyway. The graphics card will generally give better graphics performance and reduce the use of computer resources.
This motherboard supports onboard graphics, but when a dedicated graphics card is installed as you have done the onboard (rear panel motherboard connectors are disabled by the bios. There should be no reason why you should want to use both the graphics card and motherboard connectors at the same time anyway. The graphics card will generally give better graphics performance and reduce the use of computer resources.