Venting for Basement Toilet

I am now trying to figure out the venting for my sewage ejector pump. I broke the ceiling over the pit if there was anything thre - its empty.
I broke a hole in the room cieling adjacent - about 3 feet away from the sewage basin, and found the picture attached. I belive this is the vent - it is behind the ceiling. The hole I broke is about 2 feet away - I will have to break the rest of it.

Can this be confirmed just from looking at the picture here? Is there a way to confirm that this is actually the vent for the toilet?

Thanks for your time.