The splits are done by using “Add Reroute Node” when dragging out your pin.
A vector clamp works by setting a minimum and maximum to the vectors length.
Each axis of the vector will be multiplied by a value which will maintain the vectors direction but keep the length within the specified range in Clamp Vector Size.
Vector lengths increase as the values within vectors do. In your case a longer length would mean a larger launching effect.
You could also clamp each float from the vector and rebuild the vector but I don’t recommend this because it would create weird trajectories.