Uncheck a checkbox in screen options wordpress dashboard

I'm having a lot of trouble unchecking a checkbox in the wordpress dashboard screen options.

The theme I use addes a post settings div, which is always checked on.

To avoid confusion we want this to be set for all our users to unchecked.

I've been looking for a javascript function to do just that, other resources I found simply didn't do the trick.

The code is returned as such on the site

<label for="td_post_theme_settings_metabox-hide">
<input class="hide-postbox-tog" name="td_post_theme_settings_metabox-hide"
 type="checkbox" id="td_post_theme_settings_metabox-hide" 
value="td_post_theme_settings_metabox" checked="checked">Post Settings</label>

I already tried this guide but that failed sadly https://wordpress.stackexchange.com/questions/20505/make-item-checked-by-default-for-all-users-in-screen-options-pane