z650-f2 electrical rebuild using M-unit, Help

Im in the process of rebuilding my electrics on my z650-f2.
I´m using a M-unit V.2 for the rebuild so I´m thinking I need to keep the Ignition box, rectifier and starter solenoid from the original system, correct?

I have allready torn down the original setup, having the wiring chart handy I thought there would be no problem reconnecting everyting I needed. But I have one part that I don´t know what it is and I can´t identify it in the chart.

See attaced pictures. Markings on it says 1G13 and it´s connected in the original harness ritght next to the ignition box.

Any tips, directions in the right way are highly appreciated.

Regards,
Skaeggapa