Thanks to the post, I was able to get my EMC-10T to boot up from the USB emulator on my first try today. I set the jumpers as shown, hooked up the cables, and came prepared with three different usb thumbdrives loaded with the boot files. Only one of them would boot the machine directly, but if I copied the files to the USB-floppy emulator then it was fine.
Now I need longer cables and a neat installation.
Now I need longer cables and a neat installation.