But even if you place the DSP directly on the jump point, I assume that the DSP and the jump point will still be two separate things. So for example, you probably wouldn't be able to tell a ship to move to the JP and refuel from the tanker that's stationed on the DSP. You'd have to move to the DSP, refuel, then move to the JP and transit, for example.
What I was wondering was if it's possible to have the DSP be on exactly the same spot as the JP, so that a movement order to the JP would have your ship also be at the DSP. The same way to how it probably will be with DSPs on gas giants.