Whilst this is a photo copy, and some of the pages are a little askew, it was all readable and intact. A real bonus finding an old manual for a classic piece of kit that no other site had.
It was easy done, and I got exactly what I was looking for.
Text excerpt from page 4 (click to view)
MIRAGE BD-35 Dual Band Amplifier
A typical connection of this amplifier with duplex type dual band tranceiver and a dual band antenna is shown in Figure 1. If connection of this amplifier is made with either two tranceivers or two antennas, please refer to Figures 2 or 3.