As Aswan said, you've broken one of the antenna cables, and will get less range/speed. It is actually a mini coaxial cable, you will see it has an outer and centre core. You can buy replacement aerials though, I've seen them on eBay.
just add your make/model to the search, and you can find one to suit your laptop. Most times it means dismantling the screen bezel though, as the aerials are usually placed either side at the top of the screen, with the cables routed down by a hinge and down to the mainboard/wireless card.