1 wire, 2 connection to the wireless module, Each end of the antenna wire.
Not familiar with that laptop, but all the ones I have taken apart, you go in from the top.
The keyboard is usually the first thing to come off.
Some have screws under a cover strip at the top of the keyboard, and some have a switch or screws on the bottom, to release the keyboard.
Edit
The antenna is usually around the periphery of the screen.