you know, "Ozzy" is right. We went through this on another thread about the JRs. In fact a dealer told me to use all four of the bass mods posts!. yep, it's true. take out the plates or leave them in, I heard no diff on the JRs. BUT do hook to the lowest posts and the highest posts. Ever how you want to do it. Jumpers, Shotguns. or extended bi wires.
Wow! I'm still amazed why that extra set of posts is there anyhow... couple pieces of wire inside sure would be better, and less the enigma.
Ozzy, did you get the MK II's?