Node numbering in joint elements

Hello everybody,

i have a question regarding the Duplicate Nodes or Elements feature,
when i use the last option “duplicate nodes on group boundaries”, and create joint elements,

is there a rule of node numbering for these joint elements?
are they locally arranged such that the first half of the nodes is the one connected to the “left” side of an interface and the second half is the one connected to the “right” side of the interface?
Or any other rule like that that one can rely on?
i export the mesh in the end and use it in an in house FEM code where i would need to know this order.

thank you very much

best regards