Thanks you so much for the helpful information.
I want to connect the PCIE Gen2 device under High Speed Custom Solutions Connector.
On page 55 of the "NUC5i5MYBE_TechProdSpec02.pdf", it says:
Connector used is the Kyocera Series 6885 0.4 mm pitch FPC connector, p/n 00 6885 640 000 846.
But i cannot find the infomation about connector and cable. Or you can kindly provide another Serial Number of connector and cable? Thanks in advance.