You need to make sure that you get holistic estate planning advice and have arrangements in place to review your estate plans regularly. Estate plans are not to be set and forgotten.
First and foremost, it is important to understand that the payment of your superannuation death benefits are covered by the rules of your SMSF trust deed and do not automatically form part of your Estate for distribution in accordance with the terms of your Will. As trustee of your SMSF, you will need to make sure that you have read and understood your SMSF's trust deed and that you comply with it at all times.
On your death, one option is to rely on the SMSF trustee's wide discretion to determine who, within the operation of the law, will receive your death benefit and how much each beneficiary will receive.