One Step from the Answer

Well, we need to move on. For now, we only know that Tep cultists were looking for some "Source", but were killed. Maybe the Lab was sealed because of them... But it seems to me that Tep came here only later. And what confuses me most, we still haven't found any traces of the Priden Shoom Branch...
You've been very helpful. The pass that you've found will help us get inside of the Central Laboratory. If it works, very soon we will find the answers to our questions...

Come on, open the doors! I hope the pass will work...

Damn it! It was worth a shot.
I think the building was sealed for a reason. First we thought that the local guards were fighting cultists, but that modified creature that you've discovered, and also those damaged Mechanoids suggest that it was not quite so. Probably they were fighting something else, too...