With your inlet line cracked it might be possible to repair depending on how much of that inlet line exists.
as an FYI fro a better route: If you purchased that thing via HD or Lo - take it back for an exchange - they generally will do it. even if you are outside of 30 days. Damaged in shipping file a damage claim with the carrier.
Now on to the answer if the better route is not possible for you.
Repairing ABS plastic is not the easiest and I do not know if ABS is weldable like PVC pipe is.
What I would do is insert a small piece of Thin Wall copper pipe on the inside of the inlet for support and on the outer side maybe fit PVC or a tight fit Rubber Hose over the outer side with and connect my dishwasher outlet into it. You can use a high temp gasket sealant with this setup as well but don't use too much. Make sure you provide some strain/stress relief on the pipe as well.
See below for an example.