B&K 466 adapter advice needed

I've asked around on a few boards I frequent and have searched google groups for some info on this but haven't found anything conclusive so here goes: i bought a working B&K 466 analyzer restorer and in the absense of a cr-23 adapter I made my own from an old neckboard. Using the pinout information provided by B&K i was able to identify all the pins on the 466 round connector and connect them to the appropriate pins on the cr-23 adapter. Just in case anyone wants to know it goes like this:

The only problem is that because of the way the analyzer is set up, it will only give a reading on the green. the 466 round plug has dedicated g1 red and blue inputs that have no counterpart on the cr-23 adapter,leading me to believe the analyzer would see the red and blue channels as open. My question is, can i put a 3 position switch on the cr-23 adapter that would switch the cathode (Kred, Kblu,Kgrn)being read from green to blue to red all while leaving the analayzer setting on green? Would this activate and read each cathode in turn or is there a relationship between the green cathode and G1,g2 green that needs to be accounted for?

thanks!