Not familiar with the Safari tank, but I can tell you how the secondary pump in the IMS 5 gal tank works, which should be similar to any other secondary pump: there are three hose connections, one connects to the vacuum line of the bike (through the tank), one is the inlet that brings fuel from the tank wings (bottom right corner in your picture), and the third is the outlet that deposits the fuel to the main pump assembly (upper left in your picture).
The IMS tank uses a Mikuni DF-44 pump, it's likely that the Safari uses the same one.