How do I select a <slot> element that does not have a name?

Flow
1

I am using a SideNav and I want to select the highlighted slot in the screenshot below in order to apply custom styling to it:
image

How do I do that? I am aware of vaadin-side-nav-item > [slot="prefix"] from the Side Navigation styling docs but I don’t know how to select the one slot that has no name.

2

vaadin-side-nav-item > :not([slot])

3

But you can’t select the actual <slot> element. Only the elements that are slotted into it.

4

The content of the default slot is a text node, so that can’t be selected with CSS either. I guess you could target the link itself with ::part(link) and then potentially revert styles on prefix and suffix if you want to style those differently than the link text.