With the all in one systems, like the Mash & Boil, you aren't batch sparging. You are, for all intents and purposes, fly sparging. If you've set up a proper equipment profile, you entered a figure under "recoverable mash deadspace" that is the volume of water it tales to reach the bottom of the malt pipe.
In the mash profile(s), you need to enter a water/grain ratio of at least 1.2 qts./lb. and uncheck all of the boxes under "Batch Sparge Options". The software will do the calculations and determine the amount of sparge water needed. With larger grain bills you may end up with very little sparge water. In this case, you may benefit by draining off some of the wort and running it back through the suspended malt pipe.