Hi,
When removing the Wireless card from the computer it is recommended that you entirely remove the Wireless Card from the Motherboard, leave the screw threaded to the motherboard for future use and properly route the antenna cables so that they do not make contact with any other component and short them. For details on steps to remove the Wireless card please refer to the Service Manual. Also, go through the "Before You Begin" section of the Service Manual before removing any internal components. You can view/download the Service Manual from here.
Hope this helps.