Counting from the top row where No 2 is MUTE on the photo on page 1 the pinouts of the two radios are as follows:
CONCERT 1
1 BLANK
2 MUTE
3 NF -
4 NF +
5 NF -
6 NF +
7 MUTE
8 STEU NAV
9 EARTH
10 SUN SYMBOL?
CONCERT 2
1 BLANK
2 TEL MUTE
3 TEL +
4 -NF
5 NAV +
6 -NF
7 BLANK
8 NAV CON
9 BLANK
10 BLANK
I would be very grateful if you could shed a bit more light on this for me
