Mud guards

I am wanting to put mud guards on my 2019 TRD Sport. I noticed on all of the options I see on Amazon have the hole that is supposed to go into the grommet in the rear wheel well. On mine I have that grommet inside the front wheel well but not the back. Is it safe to just screw into the rear wheel well without the grommet.. I noticed even if I went OEM they still have that hole.
Thanks in advance.

 

The back mud guard uses the grommet and screw from the fender flare I think.

 

I know the back ones use the 4 bolts on the fender flare, but the hole that is in the back of the flap that leans against the inside wheel well there is no grommet on the inside wheel well

 

When I installed mine, I bought a few extra grommets and screws from the dealer.

 

Thanks for the idea, I will have to give that a try.

 

OEM installation instructions.
https://www.toyotapartsdeal.com/resources/installation/TPD/18_my16 tacoma mudguards issb.pdf

 

Thanks for the information. I also figured out what I was doing wrong. don't mind me.