Hi! I'm a STM and we are using our Britax B-Safe car seat (2 yo, not expired or recalled) for our new LO we are expecting any day now. I've looked everywhere for the "head support" insert that comes with the model (not an additional purchase, standard insert), but can't find it (we had moved so maybe lost it in the move). My question is: do you know if I need this in order to have her safely positioned and be able to pass the check to leave the hospital? I won't buy any additional inserts because I know those aren't legit, but just wanted to make sure we can make do without it? Thoughts? TIA!