Hi,
The Maximus Hero VII does not have the option to install the ROG mPCIe Combo III adapter. Only the Formula VII and Impact VII as far as I am aware have the slot available and both of these boards come supplied with the adaptor and the wireless/Bluetooth combo adapter pre installed.
If you want wireless/bluetooth for your Hero VII I would suggest a USB or PCI-e card.
If you want to add an M.2 SSD the Hero VII does have a slot available, something like the PX-G256M6e would be ideal.
Regards