[Elecraft] ID a small board

[Neil Foster]

Recently I purchased a KPOD from a local SK's estate. In a small zip bag
was board with a 4 pin connector on each end. On the back it is printed
"Remove to instal KPA3". In searching the parts list it says the KPA3 is a
12V Sense Mod 1N4148. On the front next to the connectors are marked J67a
and J67B and the component is marked C241.
I am trying to figure out what this module is and how it was used. It came
with the KPod but I am not sure it has any bearing. My radio is a K3s
Many thanks    Neil   N4FN