Question RAM socket's clip replacement

How did the clip "went missing" ??
If this is a new motherboard and the clip came missing, arrange to exchange the motherboard as defective.

If you bought this used, you are out of luck on that score.
But, since all is working, just let it be. Ram fits very snugly into a slot and should not come loose unless the motherboard is bounced around.

Then, also, you could use the alternative pair of slots.