The NGNT smart contract has a number of roles (addresses) that control different functionality. You can read more about the token's roles design on Github here.
One really important role is the owner. It can re-assign any of the roles except for admin. The address of owner can be validated by calling the getOwner or owner functions on the smart contract. To do so, you can find the contract's ABI here.
The BUSD reserves will be held by the owner address.
The owner address is a Gnosis Multisig Safe controlled by members of Token Mint.