You don't. The client side stuff is generally in /include/client/ Parts of it are in the database and can be edited at Admin panel -> Manage -> Forms. Parts of it are in the database and cannot be edited via ui. Parts of it are in /include/client/open.inc.php
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Parts of it are in the database and can be edited at Admin panel -> Manage -> Forms.
Parts of it are in the database and cannot be edited via ui.
Parts of it are in /include/client/open.inc.php