AI for Pawns .

Hi .My project is A battle tanks game .tanks move using physics.i tried to use a behavior tree for AI enemy tanks.first thing i did was calling a move to in behavior tree.I saw a video they just start moving to point when they are charachters ,but my tanks are pawns which UE4 has no idea how to move (they move by increasing a two float values for each track) them .so what will moveto do in behavior tree how to tell AI how to move to a desired location??