You’ll know where it’s at when it’s running. Under the right side of the sink under the bottom panel. Four screws one on each side. (Back one is through some trim). I’m assuming your layout is the same as mine. The base must have been installed after the door because the door hinge interferes with easy removal of the base. I was able to flex it passed the hinge but did have to bend it to do so. I had a small drip at one of the tool-less connections that I was able to tighten by hand and stop the leak. When we turned the pump on initially it pressurized and shut off but would kick on and off again every few minutes from loss of pressure and I noticed a small amount of water coining out from under the cabinet. All good now. This coming weekend we’re doing another shake down trip without shore power this time.