Hi folks,
I have now tried to put in mPCIe cards into the two msata slots to no avail. I also tried inserting them after boot to exclude any BIOS whitelisting. Also, the mysterious switch I mentioned in an earlier post had no effect.
I think the mSATA sockets are just not connected for mPCIe.
I am pretty sure the only two choices of getting wifi on the Yoga 13 are:
1. Get a USB WiFi adapter. There are really small ones that work.
2. Replace the RTL8732 by something compatible and make it work with its custom connector.
(I have tried to order the BCM4330 part that is listed in the Hardware Maintenance Manual. FRU is 20200050, but it's unavailable at least from Germany).
If I understand correctly, the Yoga 11 (the Windows on ARM machine) is always equipped with such a BCM4330 card (same FRU).
If anyone gets hold of a Yoga 11 (or the WiFi spare part), it would be best to just try out whether the card gets detected.