Pressure switch leak.
Hi james well done on those two great machines, I know just the leak you mean, it's the micro switch clipped to the white pressure vessel on the sump pipe between the tub and the pump.
If this is what you mean, disconnect the two wires, and remove the whole thing from the sump hose. the disc with the switch attached is held to the lower part with three spring clips, prize these off, watching they don't fly across the room and it will split into two parts. You will then see the rubber diaphram that pushes against the switch when the level of water is detected. This rubber disc will probably be split, and was available as a spare, so maybe ask your appliance shop.
I have got away with using a disc of rubber cut from an old bike tyre innertube , if you have to try this then you need to put it in under the old diaphram as that has a metal disc on it to press against the switch, then reassemble and it should be water tight, note though that this will have affected the sensitivity of the switch, so instead of switching the heater on once the water is up to the top of the pulsator, it will now need to be nearly full for the heater to operate.
And good news to that you now have the fill/empty hose, so hope you will soon be doing the complete wash, rinse and spin, and with a second single tub you can do a deep conditioner rinse as well, hope this has been some help, sorry it's taken so long to reply.
Mathew