It's not actually a three-way connector, it's a 2-way.. can you post a picture of yours? It basically just makes the oil take a right angle. The entire thing twists into the oil plug on the block, and when it's in all the way the banjo bolt hole should face towards the rear of the engine. Then the banjo bolt + oil feed line) just goes into that.
Alternatively, I believe SS oil feed line kits eliminate it altogether.