Paneling tool for grasshopper question

Hello, I wander way curve attractions in paneling tool for grasshopper for Mac doesn’t has surface input. I was following a tut and they showed me curve attractions tool with 4 inputs (G, A, S, M) while the latest version that I have, as I said, has just 3 inputs, S is missing. So I’m not able to connect the surface to make attractor work.
Any help is welcome
Thanks in advance


Window version is the same.
The tutorial you referenced seems to be a little outdated,
It seems curve attraction working well without surface input.

thanks very much I appreciate