Additional Mountpoint for external sdcard

in /storage/ I have two Directories with incredible long and random names for the internal and the external SD-Card.
Is it somehow Possible to set-up an additional Mountpoint?
The system itself created an /sdcard/ Mountpoint. Now I wish also a /sdcard1/ for the external. The mountpoint should based on the Portnumber not the UID or Lable.

where could I do that. I miss an /etc/fstab/

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