SP & Shimano connectors are interchangeable, I think. I'm pretty sure I've used a Shimano one on my SP.
For OP, there is another recent thread on dynohubs. My experience of Son, Shimano, SP is that the SON failed after a couple of years, had to be sent back to Germany. Then a bit after a minor collision bent the spade terminals so it needs to go back to Germany. I'm not going to bother. The Shimano has been faultless. The SP is bearing up extremely well in its 4th year of all weather use. I can't put my finger on why, but it is my favorite.