Begin by inserting the stanchions in the sockets in the lower plane.
"Let me open it for you," he said, taking the key from her hand and inserting it in the lock.
Pardon me for inserting these puny details in what I have to say.
He was not flustered, but he could not find at once the opening for inserting his foot.
So much so, that I hesitated much about inserting an account ...