I used an eyeball pass through from www.doubletee.com (purchased from ACS) and attached the control cable to the engine mount frame with double Adel clamps. On final installation I will protect and stabilize it where it passes by the upper engine mount tube by wrapping it with silicone tape and zip tying it.
Mixture control linkage
Control cable routing through the eyeball pass through
Shot from underneath showing the double Adel clamp support