Try this link and check out the factssheet link in the article points you in the right direction.
In short no you dont have to salary sacrifice and can dump a lump sum and fill out the personal tax deduction form for concessional contributions.
https://www.superguru.com.au/grow-your-super/making-contributions/before-tax
Talk more tomorrow if your interested. I'm beat and off to bed.
Rooks
