There is a video tutorial for receiving the backer role as well:
How to activate your Backer Role
1. Go to https://discordapp.com/ (browser version, do not open the app if prompted) and sign into the Discord account you would like your backer role to be applied to.
2. Visit https://alderongames.com/
3. Sign into the Alderon account you would like to connect to your Discord.
4. Click on your username in the upper right corner of the website.
5. Click on the Discord icon in the middle of the page.
6. Follow any further prompts to connect your accounts.
Note: The backer role may take up to 48 hours to appear for you, though if the role has not appeared for you, please check that your accounts are connected properly, then submit a support ticket for more assistance.