Contributions to your investment account can be made via check and electronic funds transfer (EFT).
If you login into to the Nest Egg online portal, click on the goal you wish to transfer money into. Next, scroll to the bottom and click "Change Funding." This will allow you to move money between the bank account saved on file or add a new bank account to use.
Want to send money from a new account? Click the green icon in the bottom right corner of this screen to open a ticket and have an agent get you started.