Endless Door Chiming - Found box, need help with rest

I've found the box behind my steering wheel that is making the noise already, but I can't figure out how to disconnect it.
It's a gray box with a white plastic piece next to it and green and red wires connecting them. All of the threads I've read say to just simply disconnect it with no description on how to.
I've pulled on all of the wires and tried pulling the white plastic box off, but nothing seems to be able to disconnect, I'm very confused.
No annoying answers please, I want the chime off because it's absolutely annoying. I plan on wearing my seatbelt and always making sure they my door is closed myself, I simply want the noise gone.