Ordered replacement drain hose, left hand panel of dishwasher removed (remove 2 screws in front left trim panel & friction fit clip at top back then slide up & off. This reveals the O-ring drain hose connection point. You need to remove the retainer block where the hose exits the appliance.
Old hose pulls out and new hose pushes in. In the end a very easy installation.
Most of the time spoent here is removal & reinstallation of dishwasher back into position - the actual hose swap takes 10 mins