fibaro dimmer setup

I have posted a similar thread on here before but i still cant quite get a Fibaro dimmer to do what i want.
Basically, i need to use S2 of a dimmer to trigger a scene using U7. My understanding is that i need to do 4 things;
1-enable option 41
2-associate in group 3
3-to use one click, put id 16 into a setting option somewhere
4-put the scene id into an option somewhere.

1 and 2 are ok but for the life of me i cant see where i put in the click id and most importantly, the scene id. If someone can help me with this i would really appreciate it.