67 Speed Warning with power convertible top bracket

[68crossram]

I'm restoring a 67 with the power top option, also has the speed warning option. I'm looking for a description or picture of the bracket that holds the cable to set the white needle on the speedo. I know without the power top option the cable was mounted by a bracket at the hole where the power top switch mounts. I understand when the car came with both options a bracket was made to hold the cable and may have mounted off one of the screws that holds the power top switch. Any info would be helpful.