Heater hose, 90° in smooth classic black,  fits between the main heater pipe to the 4 way heater valve, part no 095-089-0108, this is more likely to be fitted to the 1016mm (40") hose arrangement rather than the 1371.6mm (54") but please check.

The photo clearly shows the hose tucked behind the odd leg hose ( extra bypass hose listed)