TE820 cards problems

We have 4 pieces TE820 cards in one server.
How we can define via settings on server, which card is number 1, which is number 2, which is number 3 and which is number 4?
Because if later we add for example 2 cards more in the server, the cards can change their position. for example card 1 will become other number/position, and all dahdi/chan_dahdi settings will require reconfiguration.

As i know in other cards, for example in TE420 it was possible to be done via ident wheel.

Can you help please?