side doors child locks

I just bought a 2002 grand caravan. I assumed that it had child safety locks on the sliding doors that my "94 had but I don't see a switch on the doors. Can this be added or am I missing something?
Thanks for your help!

Open the doors completely, then look at the BACK edge of the door and you will find them there.

C.B.

Hello,
Thanks for your help. It's nice to know that this forum is here.
Sincerely,
mrchris401