Repair Hitachi(Hikoki)5" Angle Grinder

[@interludo]

Nice work.

[@nelchan2421]

Happy New Year

[@Nobody-mechanic-cat]

Happy New Year

[@interludo]

Hi Nobody, can you help please?
What's the part you are holding at 09:05 on video?
I dismantled same grinder and now reassembling it but not sure what is this connection (long thin metal connection) and how to fit it back correctly.
What is it supposed to connect to?