Per others above, I transferred the antenna sticker from the old dock connector and I'm not seeing any degradation of signal quality. Its the silver sticker below connector labelled "4". I also figured I'd transfer the piece of electrical tape just above the dock connector itself, though I inadvertently covered the contacts for the home button, which game me a nice scare when I put everything back together.
So far so good, my phone seems to be working great again and no longer getting the dreaded "this accessory does not support charging" message every time I go to plug in.
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