Back to the miner itself, can anyone tell me if they see a pcie plug-in anywere on those three boards (pictured on the Sfards site)?
None on those 3 boards, but probably on the backplane (not particularly pictured)? Look at the bottom two 'connectors' - they're just solid, wide traces to the power management board.
( some broken images at this time - probably fixed soon - top one shows power connection end anyway )