That seems a fairly clunky method of Regen braking, but I suppose if it was a DC motor that might be what you need to do to get regen working . With an AC motor its just built in (why I went the more expensive AC path) Video is just a normal drive to Bunnings from home ( yes its that close :) )
You see when the Amps goes to a Negative value that power is feeding directly back into the traction pack. All braking is regen apart from the final pull to a stop.
https://youtu.be/T6WyrG2CUT0

