for cars having short isn need to sync cas -dme on car . for doing that onbench you may need to connect cas dme as like in car on onbench with jbbe. for dme which have long isn no need to do sync other than match isn but for short isn dme should do cas-dme sync . autohex will do automatically from isn manager option if its on car. onbench may require the same kind of wiring as like on car so may require wiring with jbbe to sync cas-dme.