Thank you for your input.
The lump sum will come out this calendar year of death in a direct transfer to each named beneficiary's IRA. I understand that if it went to the beneficiary first then the entire amount would be taxed so it goes directly to their IRA's.
Yes, the Beneficiary Designation form included check boxes and lump sum was checked rather than "Let beneficiary decide". And no there was no plan admin.. My brother was the admin, trustee, and sole employee of his S Corp which adopted the prototype plan and made the annual employer contributions that were then invested at the bank and brokerage. Thanks again.