how to use the gobo holder or Iris on the Leko profile ellipsoidal

how to use the gobo holder or Iris on the Leko profile ellipsoidal? #kingbirdlighting #ledstagelighting #stageequipment #studiolighting #theatrelighting #theatrequipments #eventlighting #gzkb #goboholderforprofile #irisforprofileled #patternholderforlekoprofile #goboholderforstagelighting #irisforellipsoidal