J.D. Hodges

Quoted question:

[…] The laptop has three antenna cables, black, white, and grey. One of them was not used on the old wireless module. The wireless seems to work with the assignment I’ve chosen, but I’ve been having some connectivity issues which are perhaps related to an improper configuration

Quoted answer:

[…]
white cable (main connector)
black cable (aux connector)
grey cable (middle connector for MIMO)
[…]

via wireless networking – What is the correct antenna configuration for an Intel Centrino 6300 module on a Dell Studio XPS 16? – Super User.

Result of using quoted connection order:

Good performance, this order appears to be valid.