02/02/2014 at 4:25 pm #278946
This forum thread is almost a year stale … a lot has changed. The next release of Connections will have fairly comprehensive support for custom meta as well has an API to support custom metaboxes and fields.
Take a look at this post. The Business Hours extension, which is going to be released with the next update to Connections, uses the meta API and custom metaboxes and fields API.
At least two other developers are already using the development version of Connections on client sites using custom meta and fields with great success. So please feel free to pull the dev version of Connections from Github. You can refer to the Business Hours extension as to how to create and display custom meta fields.
Hope that helps.