This is impossible without the male-to-male connector. Note, also, the female-to-female connector that joins the loop to the main line—freedom from abandoning your plans because the parts don't fit!
The improved versatility of the system really makes me wonder why Brio didn't ship these adaptors with the set we bought!
It is far better to grasp the universe as it really is than to persist in delusion, however satisfying and reassuring.
—Carl Sagan