Samsung CLP 500N - Manual (Page 144)

M AINTAINING Y OUR P RINTER 6.26
10 Hold the handle on the new transfer belt and then align it
with the slots inside your printer, on each side.
N OTE : Keep the transfer belt level, do not turn the transfer belt
over otherwise looses toner may be spilled.
11 Slide the new transfer belt down into the printer and press
it firmly into place.