REFLECTOR:Disable GS Flag on King 520

[Scott Derrick]

I just hooked up a King 520 CDI to my Garmin GNC 300.

Everything works per the checkout procedure except the GS flag indicates 
  it is valid. Not really according to Hoyle.

I left those pins floating on the 520 thinking an open would cause the 
flag to retract but it didn't.

There are two pins, a GS+ and a GS-

What's the correct hookup to permanently retract the flag?  Bring which 
pins to ground or up to 12 volts?

thanks,

Scott