An implantable electrical medical device includes (i) electronics configured to generate or receive an electrical signal and containing a plurality of channels through which the electrical signal may be transmitted (ii) a first lead receptacle having a first defined number of internal contacts, wherein each of the internal contacts are independently operably coupled to a discrete channel of the electronics and (iii) a second lead receptacle having a second defined number of internal contacts, wherein the second defined number is less than the first defined number, and wherein each of the internal contacts of the second receptacle are independently operably coupled to a discrete channel of the electronics. At least one of the internal contacts of the first lead receptacle and at least one of the internal contacts of the second lead receptacle are operably coupled to the same channel of the electronics.
