C.S. questions

I just registered. First post...

I've been trying to read up as much as I can on how to use C.S.

I have a 2 plants that are clones from a Skywalker O.G

To use the c.s., do I spray one plant, and pollinate the other in the same room. Or should I just spray both individually and let them pollinate themselves in their own rooms?

Seed production is the only goal here. I understand the plant is toxic after sprayed with c.s..

Would the seeds from both scenarios be identified as S1?

Thanks for any help!