Double hot shoe - is it possible?

Is it possible to log hot shoe feedback from 2 cameras?
I am using drones caring 2 cameras and trigger them at the same time, but I want to record the hot shoe of each camera to get a precise position of each photo.
For now I am recording the CAM feedback from one camera only (using pin 53 on my pixhawk), how can I connect the second hot shoe?

Now its possivel with firmware 4.4.x