How to sync to alvium camera that connected over mip in jetson orin nx board

I am connected to 2 Alvium camera’s 1800 C-500c that are configured to wait to a sync pulse.
Could you help me to figure out what should be the GPIO line that is connected to the camera’s synchronization over MIPI .

I am using :
NVIDIA Jetson Orin NX developer kit bios 36.4.0-gcid-37537400
jetpack version 6.2
2 Alvium camera’s 1800 C-500c
Vimbax_2025-1 - sdk to control the cameras