Sorry for the delay, here’s the python code which takes a document (linked instance) as input and outputs the linked document’s total transform as a point.
#Written by Scott Lebow
import clr
clr.AddReference("RevitAPI")
import Autodesk
from Autodesk.Revit.DB import *
clr.AddReference("RevitNodes")
import Revit
clr.ImportExtensions(Revit.GeometryConversion)
linkInst = UnwrapElement(IN[0])
totalTransform = linkInst.GetTotalTransform()
origin = XYZ(0, 0, 0)
offsetPoint = totalTransform.OfPoint(origin)
#Assign your output to the OUT variable.
OUT = offsetPoint.ToPoint()
From here you can create a Vector using this point (linkOffsetPoint).
DesignScript:
linkOffsetVector = Vector.ByTwoPoints(Point.ByCoordinates(0, 0, 0), linkOffsetPoint);
Or with nodes:

Then you can translate your point along this vector using Designscript:
newLocations = Point.Add(linkedElements.Location, linkOffsetVector);
Or the Point.Add node:
