Evaporator Drain tubes routing/location on carrier Reefer

The plastic tubes and the kazoo at the ends, get clogged. The tubes are very inexpensive. Just replace them both. When you do make sure the ends of the evaporator aren't clogged as well

 

Where exactly do the tubes connect to the evaporator? I see where the tubes go up into the engine compartment then they seem to disappear in the back. Do I need to remove the top black panel or the inner panel inside the trailer?

 

Hello I have a 2009 carrier unit. This code keep coming up A18 and A56.
I have check everything but I don't know what to do at this point ☝️