Hey mate you got it right. You connect AN1 to wb+ and an2 to wb-
Then you need to pull your tech edge box appart, and take off the jumper 4.
Look here, and follow instuctions for the subject "WBlin Ground Jumper [J4]"
http://wbo2.com/3a1/default.htm
you got my number, phone me if you are stuck
----cut from site----- (go to site for pics)
WBlin Ground Jumper [J4]
This shunt controls the WBlin+ output's reference input (WBlin-). This topic is discussed here. It is important to note that incorrectly setting this jumper can result in either:
Excessive WBlin+ noise (mostly heater switching transients at 30 Hz) on WBlin+ (with shunt installed = ON when it should be OFF and WBlin- goes to the input amp's GND).
floating WBlin+ output that can exceed 5 Volts or go below 0 Volts (shunt is OFF when WBlin- is left floating).
Note that the effect of the J4 shunt can be reproduced by wiring WBlin- & GND together with a short piece of wire. This obviates opening the case to access J4
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