Current leader of a group to sidechat?

[kleaner2 0]

Let's say you have a squad of 6 guys. You name it squad01, with this command to the leader or the squad in the init line.

squad01 = group this

Now, what is the syntax to use to determine who is the current leader that is alive in that group and make them sidechat (or groupchat)?

Ideas? Is it something like:

leader squad01 select 0 sidechat "Test"

The purpose of the command is to enable the current leader of a group to say something (scripted) without having to assign the task to a particular unit (which may be dead by that time).

Thanks.