Sure. If you disconnect the Sequence Operator from the Default slot, it'll be easier to see how it works.
I the X Evenly slot the Sequence Operator is altering the "wireVertical" Segment (which size is defined parametrically by the Numeric Parameter) with the intersection joint Segment.
For the Default slot to align all properly, the size of the joint is measured & divided by to two to get the Translation value on Y axis. Then in a similar way as for X Evenly slot, the Sequence Operator in the Increment on Y mode changes between the "wireHorizontal" Segment and empty Segment (to not have "double line").