flatpickit

So, there's a black plastic piece next to a white plastic piece, both with wire bundles, inside a larger box that says DRL on the label. I've read here that the wire is hard to pull out, but what about the white box/bundle itself? Here's what I'm thinking I need to do. Please tell me if I'm wrong. I think I need to pull the white plastic box out so that it is hanging down and more accessible. Then, I need to pull out the blue wire with the black stripe. But, I can't seem to pull out the white box. At all. Is this the point where a screwdriver needs to push on a locking tab? If so, what locking tab? It is not obvious where I need to push to release anything. Some posts seem to indicate that you do that when you need the actual blue/black wire out. Oh, and i've got an 07. Any help is appreciated