Issues solving hcaptcha with callback

#1
Hi there, i'm having issues solving hcaptcha.

I'm trying to do the test on 2caps demo link: https://2captcha.com/demo/hcaptcha?difficulty=always-on
I get the captcha response back fine, I also am able to insert the response inside the right boxes.

The issue is I can't submit the captcha form. I know it might be possible to submit the form on your page by just clicking the 'Check' button, but other pages don't have that option. Is there a way I can submit hcaptcha through a callback or something? Something similar to how recaptcha works, because 2cap seem to have solved that with their findRecaptchaClients JS script.

This is a short gif of me trying to submit the hcap on your demo page with the instructions you provide:
https://i.gyazo.com/71aa665caaabcef8e6e00372e2d243c3.mp4