So my ex says yesterday that soon I'm Going to have to move the baby's seatbelt harness up one. Well…

So my ex says yesterday that soon I'm

Going to have to move the baby's seatbelt harness up one. Well of course I didn't know that and I'm not even sure when I'm suppose to do it? I should of asked but I was in a hurry. I guess I could just ask him or have him do it when he comes next. I just want to be in the loop of things. FTM