Either the T100 Thruster three wire cable or the BlueESC power cable will fit nicely in the cable penetrator 6 mm counter bore. If you are using the BlueESC then I would put a piece of the jacket from the 6 mm power cable over the control cable end to bring its diameter up to 6 mm so it will fit nicely in the cable penetrator counter bore.
Are you familiar with these BR cable tutorials: cable stripping and cable penetrator ?
Regards,
TCIII AVD
Thank you, those videos were very helpful! I was also wondering if you had any advice on connecting multiple ESC’s to the arduino. Is it as simple as connecting the first ESC to GND, pin 9, and the remaining wire to the battery, then repeating the steps with the other ESC’s except plugging them in to different pins?
Thank you 
You can connect just the yellow and brown wire of the servo leads coming out of the esc to your arduino.
The servo leads are the smaller (skinnier) three wires that end in a connector. The wires are:
brown - ground
red - +5v
yellow - signal
You can hook the yellow wire of different escs to different pwm capable pins of the arduino. When you plug the esc in to a battery through the larger red and black wires, it will supply 5 volts on the red wire of the servo lead. You can connect this wire to your arduino to power the arduino.
Okay thank you! I could also leave it unconnected if I am powering the arduino through USB correct? Also, does it matter which ground pin I plug into on the arduino?
Yes, you can leave the red wire from the esc servo lead unconnected. And you can use either ground pin on the arduino.