Dell Inspiron 15 (3543, Early 2015) - Manual (Page 58)

2 Disconnect the antenna cables from the wireless card and remove the
cables from the routing guide on the computer base.
1 routing guide 2 antenna cables (2)
3 Turn the computer over and open the display as far as possible.
4 Remove the antenna cables from the slot on the computer base and
remove the cables from the optical-drive connector board.
5 Remove the screw that secures the optical-drive connector board to the
computer base.
6 Slide the optical-drive connector board to disconnect it from the system
board.
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