Evening all 😀

I was hoping someone could help me with identifying these mystery (to me, at least) headers.

I recently bought a Highscreen 486 SX 25 notebook, unfortunately with an irreparable case, which I'm going to resurrect as an all-in-one. Highscreen were a brand of Vobis here in Germany, but it looks like they're rebadged Quanta builds.

Whilst extracting the mobo, I noticed four headers, that look like 20-pin IDC headers to me, but they have RAM1, RAM2, RAM3, and RAM4 next to them.

Now, I didn't have a notebook back in the day - my 486 was safe in a tower, so I'm bemused by these. I've looked around but can't find anything online that could explain it. Anyone have any ideas? Thanks in advance 👍