Auxiliary Engine: Oil leaking out of drain line under camcase. The marked banjo bolts are connected to the

Auxiliary Engine: Oil leaking out of drain line under camcase. The marked banjo bolts are connected to the drain line leading from the fuel oil pump tray.

The fuel oil pump tray is completely dry; however, we are continuously observing engine lube oil leaking from the same drain connection.

Please advise any other possible source or reason for lube oil entering this drain line considering that the fuel oil pump tray is dry.