I'm looking for APU fuel pump location for A320 aircraft series. I'll be much appreciated if you provide a link to some images, schemes.
According to the image below it seems that the APU fuel pump at the aft side of the center fuel tank.
And this is the view from inside the center fuel tank looking aft:
Note the pump still draws fuel from the left line, and not the center tank, it activates automatically if the left side engine fuel pumps don't provide the required pressure.
If you are looking for the high pressure fuel pump mounted on the APS3200 accessory gearbox, you can not find a dedicated fuel pump mounting pad in the gearbox. The fuel pump is integral to the fuel control unit and they are mounted piggyback to and driven by the oil pump which is the one that has a mounting pad in the gearbox.