The Raspberry 40 pin header must be connected to the PixRacer Telem2 and the power supply from the power module.
Cut one 6inch (152mm) JST-GH Cable in the middle
Cut 4 parts 140mm of the yellow cable
Remove 8 mm of the isolation of the JST-GH and the yellow cables on one side
Make a Y cable by putting the JST-GH and two yellow cables together with the white solder sleeve. (Heat level 5-6)
Make two of the above cables
One of the two yellow cables will go to the right side Pi where there are connected with a Harwin M20 connector.
Remove 3-4 mm isolation of the one of the yellow cables
Crimp a Harwin M20 connector to the cable with the Harwin crimp tool. Use the 26-28 AWG slot.
Push the cable through until you can barely see the copper - then crimp.
The PixRacer Wiring Quickstart shows the 6 pin Telem1 and Telem2 connector wiring. We only need GND, TX and RX. GND and RX will be connected with the Y-Cable. In that image the yellow connector is the PixRacer TX port which goes to the Pi RX port. So the Y-Cable is connected to GND and the yellow pin marked “RX”.
Connect the Y cables to the 6-Pin JST-GH connector. One to GND, the other one to the pin marked “RX”
Take an 8-inch JST-GH cable and remove the connector at one side. Remove 5mm of the isolation at the other.
Put this cable in the JST-GH connector at the location marked “TX”. This is the UART RX port of the PixRacer.
Now the power connections from the PowerModule are left.
Take two 6-inch JST-GH cables and remove the connector at one side
Crimp the Harwin M20 connector at that side
Insert the JST-GH Cables in pin 1 and 3 of the JST-GH 4 pin power connector
To mark the cables use colored heating tube.