Код:
maskitem = SetPlayerAttachedObject(playerid,1,19036,2,0.1,0.0,0.0,90.0,-180.0,90.0,1.2,1.2,1.2);
You can use the function "EditAttachedObject" to edit your current attached object and then you can take the true coordinations of "OnPlayerEditAttachedObject".
So, when you edit this object you can print the true coordinations in OnPlayerEditAttachedObject.