Hi, i'm new to this zero turn world and i love it so far. I just got my z235 and i'm learning it more each day. One thing i can't figure out is, right below the key hole there is a spot that says "optional accessory (see dealer)" and i don't know what accessory goes there. I see under that area there is an electrical plug not hooked up and i assume it's for this accessory. Does anyone know what this is???? Thanks!