That's a newer board. Several people got that board, but I don't know if they ever found where regen was. You can experiment with it. Regn on mine is accomplished by running the X pad to ground through the ebrakes. If you want brake-hi to work, run it through the ebrakes back to positive battery power. For either to work you have to have LVC set properly. Default LVC is 62V and supports up to ~78V battery power. Works perfect with 18s lipo. It quit working when I went to 24s until I changed LVC to 84V. I'm pretty sure there's a thread about the newer controller board here somewhere. You'll just havce to find it to see if there's any info in it you can use.