[C320-list] Waste hoses-- location

[Fred LEcuyer]

I've changed out the sanitary hose from the head to the holding tank and the one from the tank to the macerator, now I'm considering changing the vent line from the tank and the pumpout hose. Both seem to run behind the battery selector switch panel. 
 
Does anyone know if they also go past the bulkhead for the head? 
 
Does anyone have any tips for replacing these two lines?
 
Fred
 
First Light 
Hull#926