For the wiring harnas, you need 2 connectors HB3 Female for the Hella M60 lights and 1 connector H1 male which connects to the bike.

The diode BY550 is optional but has 2 benefits. First it will keep the low beam on when switching to high beam and second, it wil make it possible to connect a GPS or phone to it. Without the diode your GPS or phone will switch off when you switch to high beam. 

Very important, when buying these connectors, do NOT trust the color of the wires. Look at the diagram below and only use the placement of the wires. 

Make sure all wires are properly isolated with tape or heat shrink tubing.

Hella M60 Connections