appointments+ and Marketpress integration

Hi - I hope you are well today. Im integrating appointments+ and Marketpress. I am scheduling appointments like a dream, but cannot get them to show up in the cart.

I would like clients to be able to choose multiple appointments and put them in the cart -

i have Payments set to "manual" in market press. I do not want clients to pay anything at the time of scheduling.

I do want appointments to auto confirm - i have this set to "yes"

here is a screenshot of a couple of the types of appointments+ code i have tried in my product descriptions and a link to a product on the front end.

thank you!