How to append a particular element/id in plugin's site settings in javascript

How to append an particular element/id in plugin site settings in javascript ,can anyone assist me in this?

Hi, can you clarify what you’re trying to achieve?

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I’m developing a plugin and in the plugin’s js-es6 file, using the plugin-api, I get attributes such as id, user_id, and so on. In my site settings, I have an input box where I can store ids manually. Here, I get the site settings and its inputs in the js-es6 file, but I am stuck because I have to append or update the site settings input box with the attributes that I get from the plugin-api, and this updating of the site settings input box is to be done by a button on the post menu.