Today I installed the cabin heater control cable. The cable is routed from the panel through the F-902R bulkhead and down the 601D-R-1 firewall stiffener and then through the F-601L vertical stiffener to the valve box lever. There is a snap bushing in the F-902R and I used an Adel clap held in place by the bolt that fastens the heater box. It is a neat simple control and works effectively.
Cable connection with Adel clamp
Push nob
Cable is routed through the vertical angle per the plans