Having issues connecting wheel to wheel base

I bought a second hand ddwb15 wheelbase and are having trouble connecting the wheel to the hub I can get it to click in and everything, but it will not go over the metal clip to fully lock in. Can someone assist me with figuring out a fix I have tried putting it on straight where it locks in with a little bit of force, me and my friend got it to click in twice, but it took both of us to get it to pop in correctly. I am open to any suggestion