My module has a board inside with a connector marked as J2. Both of the first two pins of this connector go to Pin 8, none of the wires on the cable from J2 to the OBD II connector go to Pin 7.

Using the instruction of soldering the pins together, this has to mean that there is something on Pin 7 that I am not getting now. Whatever exists on Pin 8 goes to the first two pins of J2. If I install the jumper, then whatever is on both Pin 7 & Pin 8 will be delivered to the first two pins of J2. (J2 is not marked with pin numbers, the first two pins are merely adjacent to one another, they can be 1 & 2 or 5 & 6.)