You have to create an abstracct “offset” something that create the difference you need.
Lets say you have 2 planes, both with a “Socket” in a random place, that is not in the midde of the plane and not on the pivot.
One upper left, one upperight.
And you want to placce the two socket in the same place.
You have to get the difference between the “pivoot” and the “Socket” ,
Now Make a scene component in your plane, mmake the plane child of the scene comp.
Now if you attach the actor to the socket you just place the middle of the plane A, on the Socket of Plane B
What remain to add is the difference you calculated before,
So add a local position to the Scene component, based on the think we calculated before.
And here you should have the 2 planes with sockets in the same place