How to customize uploadcare in Webflow?

Hi guys,

I’m trying to customize the Uploadcare button on my Webflow form but I don’t find how to do it.
Is someone know ?

Important informations :

source code for the button :

You can find the button on this page :

It only appear on the site because of the script, so not on the preview.

I tried to custom the code in the custom section of the page, maybe the call i chose isn’t the good one ?

Thank you,

Here is my site Read-Only: LINK
(how to share your site Read-Only link)

This should help