Australia 143 Where can I sign for paying parents' immigration?

Should I submit the materials to the Australian Immigration Bureau or submit an application? The embassy of the country where the person is located The following information comes from going abroad:

Australia 143 Parents must first prepare complete materials, and send them to the Australian Immigration Bureau after a full set of examination. You can apply to enter the queuing stage in about 2 months; Receiving the transfer letter and supplementary materials from the Immigration Bureau; It mainly includes: physical examination, notarization without crime, and financial guarantee of guarantor; Then there is the pre-signing, receipt letter. ...