SJ jumper disconnecting

Hey I saw the autonomo has SJ7 jumper that can be used to connect the charge status to A1.
I have never done this before and have no clue what to do with this jumper.

Can someone explain it?

EDIT: found out that soldering will fix it.

On my Ndogo I want to disconnect the LED which can be done by disconnecting the SJ1.

The SJ1 is currently OPEN (2 sides obviously not connected), however the LED is ON.

This schematic shows that the LED shouldnt be ON since the SJ1 is open… Is the schematic wrong or am I missing something?

If I connect the 2 sides by a jumper cable the LED stays on…

Could breaking the LED with something sharp do any harm ?