I am assuming these are a male and female? There were two on the window at night, and then a further three the next day (two dark coloured, three lighter).
Despite being described as 'Dry country" iNat has recorded this species on the southern New South Wales coast as well as the Otway ranges and East Gippsland in Victoria.
Although the antennae are not sharp except in the first image compared to the CD and examples of O. rufescens on iNaturalist I think their overall size and shape are not inconsistent with the CD male antennae for that species. The out of focus antennae appear to show the same 'jizz' as seen on iNaturalist examples. (Note 'jizz' was a favourite term used by naturalist and ornithologist Graham Pizzey to describe the overall look of a species combining different criteria).
A reference to 'jizz' by Graham Pizzey may be found in the last paragraph of the section 'Recognizing birds by habit and behaviour', part of the 'Introduction' pp. 9-17 of Pizzey and Knight (1997) 'Field Guide to Birds of Australia' HarperCollinsPublishers, Australia.