So I opened my HUB5000 and it appears that there is an IPX connector on the corner of the chip. It looks like it isn't as deep as other pictures I see.
Can someone from Phidgets confirm or deny any of this?
You can't use the MHF4 antenna connector to connect an external antenna because there is already a chip antenna connected - you would need to cut the trace to the chip antenna for it to work.