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Wireless card for Precision M4700 laptop

I have a Dell Precision M4700 laptop, service tag <Service tag removed>. I bought a Dell Wireless 380 Bluetooth 4.0 Module CN-3YX8R with cable from eBay. I confirmed this is the correct Bluetooth card for this laptop. However, the cable does not match the motherboard socket, it was slightly too long and looks different. Here's the listing:

On further research, I discovered there is a mini-PCI card which can be installed which contains dual band Wifi + Bluetooth 4.0. Here's one from I located on eBay:


DSC_0052.JPGCable end does not match vertical black socket...or is this wrong location??? Hidden beneath something???


DSC_0057.JPGDell 380 BT card and cable attached


DSC_0056.JPGIs the black vertical socket where the BT cable goes???


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