Internally, the BC120XLT, BC220XLT, Commtel COM214 and Albrecht AE95H are almost identical scanners. These scanners use an MC3361 receiver IC,
with the unfiltered audio at pin 9.
This pin is a little hard to reach, because of an elevated circuit board right next to the 3361.
There is more than enough space for a 3.5 mm socket. It can be mounted on the side in the scanner's back panel. The ground lug of the chassis
terminal can be soldered to the shield in the back panel. When the scanner is closed, this shield is connected to the scanner's ground.