first , set a condition and then the events: SSN2SSN(
AIssnnumber,
Chairssnnumber) , that will tell the AI to go to the chair. After that, use SSNUSE(
AIssnnumber), and that will tell the AI to attach to the chair. You have to do that for every single AI you want to attach to chairs. Be careful with those commands it will crash the game if you don't use them correctly.
check this tutorial for more info
http://nile.dfreload.com/index.php?showtopic=62