An adapter apparatus for a respiratory therapy system having a pressure generating device and an electrical heated tube assembly coupled to a patient interface device, comprising: a first end having a first port member structured to be fluidly coupled to the electrical heated tube assembly; a second end having a second port member structured to receive a flow of breathing gas generated by the pressure generating device, the adapter apparatus being structured to deliver the flow of breathing gas to the electrical heated tube assembly through the first port member; a jumper wire harness assembly having a first electrical connector structured to be electrically coupled to the electrical heated tube assembly and a second electrical connector structured to be electrically coupled to the pressure generating device in order to provide an electrical connection between the electrical heated tube assembly and the pressure generating device; an inline accessory device having at a first end a male fitting that is directly fluidly coupled to the second port member and having at a second end a female fitting that is structured to be directly fluidly coupled to a port member of an outlet port of the pressure generating device, wherein the jumper wire harness assembly extends along a length of the inline accessory device, and wherein the inline accessory device comprises an oxygen enrichment adapter, a pressure valve or a bacteria filter; a connector housing, wherein the first electrical connector is received and held within the connector housing; and characterized in that the first port member, the second port member and the connector housing are provided as part of a fluid coupling member, and the fluid coupling member includes a housing that covers the connector housing and receives and holds at least a portion of the jumper wire harness assembly. a first end having a first port member structured to be fluidly coupled to the electrical heated tube assembly; a second end having a second port member structured to receive a flow of breathing gas generated by the pressure generating device, the adapter apparatus being structured to deliver the flow of breathing gas to the electrical heated tube assembly through the first port member; a jumper wire harness assembly having a first electrical connector structured to be electrically coupled to the electrical heated tube assembly and a second electrical connector structured to be electrically coupled to the pressure generating device in order to provide an electrical connection between the electrical heated tube assembly and the pressure generating device; an inline accessory device having at a first end a male fitting that is directly fluidly coupled to the second port member and having at a second end a female fitting that is structured to be directly fluidly coupled to a port member of an outlet port of the pressure generating device, wherein the jumper wire harness assembly extends along a length of the inline accessory device, and wherein the inline accessory device comprises an oxygen enrichment adapter, a pressure valve or a bacteria filter; a connector housing, wherein the first electrical connector is received and held within the connector housing; and characterized in that the first port member, the second port member and the connector housing are provided as part of a fluid coupling member, and the fluid coupling member includes a housing that covers the connector housing and receives and holds at least a portion of the jumper wire harness assembly.