Those sure look like the right cams.
There should be a lever on the front right side of the cam compartment that needs to be pushed to the right when inserting cam. Then you need to make sure the retaining pin on the cam holder goes into one of the holes in the bottom of the cam and then push down.
Do you have a manual? There is one available, even though not real clear.
https://s-ish.com/wp-content/uploads...7861_17862.pdf
The instructions for inserting the cam on page 41 of the pdf.
I'm not sure if this link will work to the page for instructions on inserting the cam. (it looks like it does)
https://html.scribdassets.com/47oliz...eed8e9efa8.jpg