I'm a little unclear on what you are trying to do.
Are you trying to connect your domain name with your Hosting company? To do that, you just need to change your Name Servers:
1. Log into your Dynadot account.
2. Click on the "Domains" tab at the top of the page.
3. Find your domain on the list and check the box next to it. Press the "Set Name Servers" button.
4. Enter your two Name Servers in the very first boxes. Then press the "Enter Name Servers" button.