I have two of this connectors. All New and unsoldered.
Easily got them here: https://www.arrow.com/en/products/2199015-1/te-connectivity Nice and fast shipping.
Bought them with the idea of making one of this adapters for my y510p. Asked Gerald for some advice via pm but he never answered back.
Was wondering if there's a way to solder it to a cable like this : https://www.ebay.com/itm/EZDIY-FAB-PCI-Express-PCIe3-0-16x-Flexible-Cable-Card-Extension-Port-Adapter/223213791263?epid=4012486079&hash=item33f894281f:g:8AIAAOSwhZ5b24k9:rk:30:pf:0&LH_ItemCondition=3&LH_BIN=1