I have to inject a Codesnippet on a specific place in a html.

For example:

```
<section class="newsletter">
content content content
</section>

```

Now I want the Tagmanager to inject on this section another code instead of the section newsletter.

```
<div class="injector">
content content content
</div>

```

Ive tried some scripts but none of them showed the content. The custom html has been loaded, but did not replace the section.

How should i do this?
Thank u!