Sendy

I an using Sendy (https://sendy.co/) for email lists, but am unable to add the list id somewhere in the Enews widget. I can only put in a form action. Is there a way to add the list id? I asked already on Sendy form but they required me to ask this question here.
So, is it possible to use Sendy service with Enews extended?

https://ww.wp.xz.cn/plugins/genesis-enews-extended/