Giving a simple command to a unit

Could someone explain to me how in LUA a move command can be given to a currently selected unit?

IssueMove(tableOfUnits, position)

Have in mind those command only work in the SIM-State of the game.
That means all players need this mod installed in a network game or you will get desyncs.

Before you ask, there is no move command for the UI-State of the game.