Survey Point in Gauß Krüger coordinate system - project base point (0,0,0)

Hello everybody :),

I'm relatively new to Revit, but I have a major problem and altough I did a lot of research I could not find a satisfiying answer to my problem. I have an exisiting dwg file. The original coordinates are in the "Gauß-Krüger" coordinate system (the most used coordinate system in Austria). I can give the survey point the coordinates of a chosen point. After I clip the survey point I want to put it in the same position as the project base point. But I want the project base point to have the coordinates (0,0,0). However, if I move the survey point to the project base point postition the coordinates of the project base point change, since it is somehow linked to the survey point.

I hope that someone can help me, altough the question might be super-basic.

Thank you in advance for your help!

Lisa