The details of the Superannuation payable should be located in your wages records (online or manual). The Super Fund/s that you need to make this payment to would have been provided to you when your employee handed back the 'Super Choice' form when you first employed them. The ATO website provides you with guidance on preparing to engage workers (site found here). You will need to register with each different Super Fund to get an employer number so that when payments are made it is recognised who has made these payments.
If your employee has not returned the Super Choice form to you then you make your payments to the default Super Fund identified in the Super Choice form so that you do not get penalised for late payments.
If you have any queries in relation to this please contact us.