Your changing your story, now you say you have 9V at the mic end (and that's how it should be). One way or the other, that diagram is right on.
Let's suppose you do have it right--this is a battery box, not a preamp, so you will not get a terribly strong signal in the recorder. Tell us, what mics are you using, what setting do you have on the jb3, what are you recording, and how strong is the final recording? By the sound of your last post, everything is working the way it should.