To follow rnbhays' comment about the antenna connector on the left, it is specifically for i545 Verizon models.
I strongly suggest people to disconnect both left and right cables from the USB board prior to removing it. While doing so, my tool slipped and I accidentally broke the left cable. Thankfully I was able to crimp the connector back on the cable with tweezers and a magnifying glass 'til I get another cable ordered.
I'm seeing midframes available on Ebay for around $10.