new to us 89 excella 25

[raveson]

Going through the orig manual, there are two water inlets, one on each side plus the one for city water to use to auto fill and use when hooked up. My question is there is one on each side of the trailer. According to the manual one is for flushing the black tank but it does not identify which side. Any one know what side the black tank flush is? both inlets have keyed entry.
thanks in advance!

[88Limited]

It should be on the same side as the city water hookup and the dump handles for the your grey and black tanks.