Driving Active Speakers from a Behringer Powered Mixer PMP560M

I have active speakers that I need to use with a powered mixer ( Behringer PMP560M). It has no signal outputs but I suspect that the output maybe BTL. Therefore the usual circuits are no good as they are designed for a traditional single ended amp & will short a bridged amp.

Before I tackle the detailed design work, has anyone seen or designed such a circuit?