First picture shows the camera port.
Second picture shows the Micro-USB port to access the eMMC.
The camera port uses an HDMI connector to transmit CSI signals. To use it, you need:
- Raspberry Pi Camera (HQ or V2 or NoIR V2)
- Pi Camera HDMI Cable Extension (adapts CSI signals to HDMI interface)
- HDMI cable with Mini HDMI plug (Type C) on one end (plugs into the RevPi Compact) and regular HDMI plug (Type A) on the other end (plugs into the CSI adapter)