That would be odd
That would be odd if the bilge pump was under the engine. The most likely place would be directly under the stairs. There is an opening there in my E29 that is about 10x10". Both the automatic float switch and the pump are deep in the keel, but can be reached by sticking your arm down in the hole. Pump out as much water as you can before looking for it, and use a flashlight.My manual pump, by the way, is in the aft locker behind the helms position. If you have a manual switch for the auto bilge pump perhaps (with a little effort) you could trace the wiring back to it.