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burningjello - I got an extension cable, plugged it in to the OBD port, and that solved the problem. I was able to use an EcuTek cable with the extension, as well as 2 different dongles, and everything works fine. Worth a try for $10. This is the cable that worked for me:
http://amzn.to/2lXice7
Although if I had to do it again, I like the idea of one with a switch (linked above).