How to change output inserted via template hooks

[sinucello]

Hi,

I`d like to replace the field "location" with another field. I think the field is inserted via this code:
$template_hook[postbit_userinfo_right]
in the postbit_legacy template.

Here`s a screenshot of the field:
http://screencast.com/t/7SXl7CVkBGw

Where can I find the definition of what is displayed there?

Thank you - all the best,
Sacha