gps receiver installation

[sangermike]

I purchased a autometer gps with a puck style receiver from keith eckhart about 1 1/2 to 2 years ago. as my boat had delays in completion due to the shop it was at it is finally time to install the receiver at a new shop. The box and instructions were lost at the shop it was at and i was lucky to get what i got. the receiver has 6 wires unlike the pucks that all of hardin marine business sell now. the extra wire is purple in color. I called the techs at keith eckhart where it was purchased and they only have the 5 wire pucks. Has any one installed a puck with this wire configuration on a autometer gps or is this receiver for another type gps head. any input would be appreciated