Yes, there is a long cam and a short cam.
If one of the frames has the cam hole thru both sides it is the long cam.
The short cam will fit in both frames.
“Do not yearn too much for a sword made by a famous smith. This is because even if you give a good man a sword worth ten thousand coppers, he will not be able to beat a hundred men each holding a spear worth a hundred coppers.” - Asakura Takakage Toshikage, 1462-1482
Whatever your hand finds to do, do it with your might; for there is no work, nor device, nor knowledge, nor wisdom, in the grave, where you go.