5050701042 https://tools.molex.com/pdm_docs/sd/5050701042_sd.pdf SlimStack Board-to-Board Connector, 0.35mm Pitch, SSB RP Series, Plug, 0.60 or 0.70mm Mated Height, 2.00mm Mated Width, Circuits, Armor Nail, 0.15mm Fitting Nail Width 0.53 Molex 5050701042