Cant get the last gears

I just built a mechanical, internal routed bike with:
New internal liners, new cable outers, and new cable but i seem to be unable to get the proper tension for shifting all the way to the lowest gears even though the L/H and limit are set up correctly.

You can see in the video where it stops.

I tried a new cable, to pull as much as possible when clamping the cable, but i cant seem to find a solution

What else am i missing?

u/GFlunk — 2 days ago