thanks for taking the time to check my question. Firstly, let me describe the current configuration, I am using 4 cameras that produce non-overlapping images and the goal is to calculate their relative positions.
What I've tried so far:
 ROS Kalibr package. As the frames have a little overlap I tried to use a aprilgrid target hoping that if one marker can be caught to the frames I will have some hope to calibrate but it did not work, the overlapping areas are too small so there is no use to that.
 Meshroom camera rig calibration. For now this is my best bet but I can not find proper documentation about the workflow. Any ideas on how the pipeline should be are welcome.
In conclusion, all ideas are welcome because as you can see I have practically none.
P.S. I made this post more general instead of asking just about meshroom, thinking this might be helpful to more people in the future.