Wanting to know the full function of the reverse override switch. Handle bar tag says reverse and 4wd override. Does this allow the 4wd to operate in reverse at higher rpm or is this switch needed to disengage the 4wd. I see their are two wire & three wire switches learned this after purchasing a 2 wire, mine is a 3wire. Can the 2 wire be made to work. Thanks for any input Steve.