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Can someone identify the correct sockets to plug the Antenna cables into on the underside of the Logic Board. This is urgent! Thanks and much appreciated! There are 3 cables, one to the left antenna, one to the right antenna and the third going to something else. Thanks again! This is the closest example I can find, but still no success! I am getting “Searching…” on the iPad and then “No Signal”, Both Sim Card Reader slot has been replaced and also the antenna’s replaced..
Review this IFIXIT guide: iPad 3 4G Logic Board Replacement. Jump to Step 39 for the ribbon cable for the headphone and Cellular antennas & 41 for the WiFi.