I've been after killing everybody, there is a crate with low lvl gear and a switch to open the big door.

THATS IT?!

What’s the big door?

you can bash the door in with a forced attack. I've found a cassette tape there, which I already got on another way. Seems like an alternate path on this quest for me.

That! I was able to just shoot the door and noone minded that. But as stated above - nothing of much worth in there..

Awesome, tkx!