  We study possible correlations between properties of the observable and
hidden sectors in heterotic string theory. Specifically, we analyze the case of
the Z6-II orbifold compactification which produces a significant number of
models with the spectrum of the supersymmetric standard model. We find that
requiring realistic features does affect the hidden sector such that hidden
sector gauge group factors SU(4) and SO(8) are favoured. In the context of
gaugino condensation, this implies low energy supersymmetry breaking.
