You might be thinking of EnderIO machines, which can accept items and export products on the same face. You can just set the face of an EnderIO machines to the same face as your ME Interface, and it'll work fine.
TE machines, as far as I know, do not accept items pumped in from an output face, so you would need to connect an import bus, another interface, or some itemducts or something connecting to an interface to get the products back into
You might be thinking of EnderIO machines, which can accept items and export products on the same face. You can just set the face of an EnderIO machines to the same face as your ME Interface, and it'll work fine.
TE machines, as far as I know, do not accept items pumped in from an output face, so you would need to connect an import bus, another interface, or some itemducts or something connecting to an interface to get the products back into your network. So yes, you would need to connect three things to them (unless you use fluctuating itemducts or XU to remove the items and provide power).