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How to remove built-in 3G/4G modem from Thinkpad T440s?

I bought a Thinkpad T440s, it has a 3G/4G modem card. This card blocks a slot that I need for my M2 SDD card:
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I do not have any mobile card in my Laptop, so I conclude that I will probably not need a 3G/4G modem card. It was connected with two cables, one on the Main socket and one on the AUX socket. I switched the AUX cable to the Wireless-N care. The Main cable is just hanging around. Is that how to remove the AirPrime card? Is it okay to have the yellow main cable hanging around?