waterbox dx

I just received my syncra sdc pump and was trying to fit it onto the dx plumbing, but the hose fittings are either to small or to big. Am I doing something wrong? photos of the waterbox pipe are attached

Hello All, So I'm looking to get a waterbox 60.2DX because the standard sump in my opinion is straight trash. I am having trouble understanding the DX sump for the 60.2 because there is an ATO reservoir in it when I could be using that real estate for a refugium for my tank. (picture below for...