If you plug your serial no. on this page:
http://www.shopezgo.com/common/templ...ialnumber.aspx
it indicates a 1999 TXT standard. This means a series wound motor and appropriate controller. If you are referring to magnets used to fool the speed sensor on some sepex type carts (club car mostly I believe), this doesn't apply to your cart. EZGO PDS carts use a plug (jumper) in the speed control to set various speed controls. This doesn't apply to your cart either.