Patent ID: 8543209

Claim:
A secondary header for an active implantable medical device (AIMD), the secondary header comprising: a) a proximal electrical contact plug having four electrical contacts and being configured for mating physical and electrical insertion into the AIMD ISO DF4 or IS4 connector cavity; b) a primary connector cavity having less than four to zero primary electrical contacts conductively coupled to respective ones of the four electrical contacts of the proximal electrical contact plug; and c) at least one replacement connector cavity having one to four replacement electrical contacts not provided by the primary connector cavity, the one to four replacement electrical contacts being conductively coupled to respective electrical contacts of the proximal electrical contact plug not conductively coupled to the less than four to zero primary electrical contacts of the primary connector cavity, d) wherein each of the four electrical contacts on the proximal electrical contact plug is either: i) only conductively coupled to a respective one of the less than four to zero primary contacts of the primary connector cavity, or ii) only conductively coupled to a respective one of the one to four replacement electrical contacts of the replacement connector cavity.