It has no holes for water inlet (tap connection). Instructions say to knock these out on the appropriate side.
However there is a hole in the rear of the cistern for rear access. This would suit as I can pass a flexible tap connector through it. This can emerge from some boxing in I have constructed against which the wc will be placed.
So - are there any cistern flush mechanisms which allow internal connection of the cold water feed inside the cistern? I cannot find one through searches, but I vaguely recall when installing a previous Fluidmaster that the instructions showed such a variant.
If one exists this would save tapping out the water inlet connection, which makes me rather nervous.