I don't know about your Robo3D R1, but the way they secured the wiring harness to the extruder on ours was pretty amateurish. It was kind of just a cable tie looped through a convenient spot and hope for the best.
Well, I figured I could do better. Here it is, the NEMA17 motor mount wiring harness arm. I printed it in ABS and bolted it on.
Now, you'll probably have to get a couple of slightly longer M3 screws depending on your stepper motor.
This gives you a generous seat for the cable harness and extra holes to cable tie any stray wires from all those upgrades you've done (I put on an E3D v.5 hot end)
ABS: Extruder 235C Bed 80C
The large disk at the end of the arm prevents warping off the bed and is easily removed once the part cools.