Wait until day 7, when they may have come down.
More likely is that they are down but the lambs retract them when you are feeling to find them - not daft, lambs
. Best to do it as quickly as possible, and if you can't find them, then let the lamb go. A relaxed lamb lets it all hang out
Have some small scissors handy, such as a Swiss Army Knife, so that if you've missed one or both you can carefully cut off the ring.