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No
On the black "fixed" terminal board after the "CN4" marked SE (White), -E (Blue), +E (Brown).
No
Current all cards are 433 MHz. If they are replaced you must also replace the remote controls.
Given that motor model is "dated" and the card is new, there is no guarantee the sliding gate will work properly without the limit switch kit.
No
The procedure for storing this code varies from control board to control board. Therefore, the procedure for storing this information is located in the instructions manual of the electronic board installed.