Closed loop steppers ALM option question

So basically I have 4 closed loop steppers with they’r own drivers, the driver is CL57T, and there is an option on it called ALM. There’s not much info in the documentation about it, but from what I’ve read online this can be used for limit switches. Now, my question is, how do I use this option. What would a connection be to the board, or in this case I don’t use the driver board itself and the driver does the necessary.
Right now o have relays between the induction switch and the controller board.
I’m thinking of using this ALM to be able to auto square the y axis, since there are 2 drivers and 2 steppers.