  We study the transport properties of a twisted bilayer graphene flake
contacted by two monolayer nanoribbons which act as leads. We analyze the
conductance in terms of the spectra of the bilayer nanoribbon and the monolayer
contacts. The low-energy transport properties are governed by the edge states
with AB stacking. Remarkably, the electronic conductance in this energy region
does not depend much on the relative position of the leads, in contrast with
that of bilayer flakes with more symmetric stackings. We attribute this feature
to the localization of these low-energy states in the AB edge regions of the
flake, having a much smaller weight at the junctions between the flake and the
nanoribbon leads.
