I suggest adding a header like in the screenshot

Here's the code for it if you'd like to just copy-paste

const getLinksContainer = container => {
const node = document.createElement('div');
node.classList.add('where-to-watch-widget');
const header = document.createElement('span');
header.classList.add('where-to-watch-header');
const headerText = document.createElement('span');
headerText.textContent = "External Links";
header.appendChild(headerText);
node.appendChild(header);
const links = document.createElement('ul');
links.classList.add('nav');
node.appendChild(links);
container.appendChild(node);
return links;
};