you have 2 sides: the one with the "angled and solid" turn down, and the one that has the loose clamp on it.
Hook up the solid end first
Now with your left hand holding the sink to balance it, get a pair of bent needle pliers and clip the other end on.
YES, it is HARD to get on.
Might wanna take the clip and bend it back and forth about 20 times, that should make it easier (that's what I did, and it works fine
)