Abstract: A connection in a cardiac pacemaker features a double ended fixed sleeve anchored midway between opposite sides of a pacemaker jacket in electric communication with the interior mechanism. The fixed sleeve is double ended and capable of accepting either of two collets of the same outside diameter at either end. One of the collets has a larger inside diameter than the other for connection to an electric lead wire of size corresponding to the respective inside diameter. An equalizer sleeve carrying a collet draw screw fits either end of the fixed sleeve and is mounted at the end opposite the selected collet. When occasion arises for reversing the lead connection, end for end, to connect, for example, a lead of different size, the first lead is released from the collet as is also the equalizer sleeve.