What is this bolt near the latch connected to?

Hi TW,
I heard a rattling in my door and checked it out, noticed that this bolt was pretty loose so I tightened it down. May have done a little too much because a few weeks later, I shut my door and the screw snapped. Initially I thought it goes to the window actuator but am not too sure. Can anyone tell me what this bolt connects to, and possibly the size?

 

That holds part of the window guide.

 

These are the best pics I have. I'm working on a write up for changing out a bad lock actuator (when the door is stuck shut and locked) and had these pics lying around.

In order to find the size and thread and pitch, your best bet would be to pull the one from the other side and take it to a hardware shop and get a matching bolt. I can't remember the size, unfortunately.

 

Thanks man! Unfortunately the rest of the bolt is still threaded inside and the screw will need to be drilled out