I found another post that detailed this fix, which allows you to view a KB from the SSP, but still doesn't solve the next problem I will post about, not being able to display a KB comprised of only External content.
I used the default location so my web.config file is placed at C:\inetpub\wwwroot\System Center Service Manager Portal\ContentHost\Web.config
Example:
Edit from
<add key="ContentHostAbsoluteUri" value="https://SCSM01:443/ContentHost" />
To
<add key="ContentHostAbsoluteUri" value="https://SCSM01.contoso.com:443/ContentHost" />