This kind of cluelessness about how double basses work is why we don't go to our local violin shop to have them set up there. We go to a real doublebass luthier !!
Actually it is a CIA listening device or maybe aliens at work. I have never seen this product before. There wouldn't be room under the tailpiece anyway, would there? I love the color and grain of the wood in the background.
I think this kind of tailgut is made for a different kind of tailpiece where two holes are at the back of the tailpiece parallel to the length axis of the tailpiece. Typical for cello, not for bass. The problem is that bass is not part of most luthiers education, even not in Mittenwald (except you want to learn this and ask for it). So they hardly see a bass at all to learn. And one reason is that since we know that they might not know, we visit a specialized bass luthier and that way they see even less basses.
The tailpiece shown came this way from the maker, as far as I can tell. Two holes in the front face is a very common arrangement. The brass insect antennae are not !!!
The brass insect on the right kind of tailpiece would be hidden below it. But if the luthier delivered tailpiece and tailwire together, then shame on them if they don't offered to correct that when they will get the right part(s) for the tailwire.
This is the "tail gut" on my Alcoa's custom Deuce Tailpiece. To my eye, it looks pretty similar to the one in the OP. Btw, this is not intended as an endorsement of the OP's tail gut situation.
This is the way that kind of tailgut is intended to be used (like I said before on a cello). On a wooden tailpiece the two holes in the tailpiece are just much longer.
dhergert, that is the most amazing bridge and tailpiece set up. Dear old classical me, I have yet to see an Alcoa bass either. A space ship really has landed (I'm a Star Trek fan from way back)!!
My friends have known me to call her affectionately "Deena", short for "sardine can". Happily, she sounds pretty good, better than a sardine can anyway. Fwiw, I've seen Deuce Bridges on other basses, but I've never seen another Deuce Tailpiece (which is why I assume it was custom-made for this bass).