Caution No connections for a pump here!

Since this is not our first pool of this kind, we were glad to find a site without accompanying pump, since we are using a sand filter.
But that does not seem to be provided to connect a pump here, but has surprised us.
There are not accompanied fittings that must be passed through the pool wall to it to attach the hoses to the pump.
Had we not randomly picked up these parts from the old swimming pool in the last year, we would have sent the pool back.