To Create a Datum Target Attached to Another Datum Target (AutoCAD Mechanical Toolset)
Using the following method you create two or more datum targets attached to one leader.
Click Annotate tabSymbol panelDatum Target. Find
In the Termination Type dialog box, select Attached to Another.
In the drawing area, select a datum target symbol to attach the new symbol to. The pick point controls the position where the program connects the datum target.
In the Datum Target dialog box, enter the data for the datum target.