Setting height of compositons with object grabber?

Hello everybody i am using this script in a game logic (objects):

if (isServer) then {_newComp = [(getPos this), (getDir this), "GuardPost2_US_EP1"] call (compile (preprocessFileLineNumbers "ca\modules\dyno\data\scripts\objectMapper.sqf"))};

What i want to do is set the height of this guardpost like on top of a building. I do know how to set heights no worries. But i dont know how to incorporate it into this script, if that is even possible. Thanks for any help in advance people!