Installing an automatic bilge pump

I am looking at installing a Whale Supersub 650 automatic bilge pump:

whale-supersub-smart-650-bilge-pump-12v

 

with a SeaWorld bilge pump switch panel with alarm:

seaworld-12v-bilge-pump-switch-panel-with-alarm
Where is the best place to locate the pump, under the engine or is there a better place?