6 of 1, half a dozen of the other however, looking at the ERSA FPL and what usually gets filed, if the aerodrome has a waypoint allocated above(intersection) on an airway then the 5 letter waypoint should be used then DCT
eg, flight from YTWB-YCCA
DCT BIVAT Q303 YCCA DCT
if YCCA had a waypoint above
DCT BIVAT Q303 XXXXX DCT