Need help finding a key

[Peppi]

Spoiler below!

I´m searching the key for the yellow vehicle. I found the can and i read the key is in the same room but i cant find it. where is the key?

[barf0r]

Spoiler below!

There is a green box on the wall. The key is in the box, you have to swing the front of it.
I can't remember if it is in the exact same room, but its close by.

[Peppi]

thx alot i found it