A connector for an electrical stimulation system, the connector comprising: an assembly of individual contact modules arranged along a common axis and formed from a biocompatible, rigid, non-conductive material, the assembly having a first end and a second end, each contact module comprising a body having a first major surface and an opposing second major surface, the first major surface defining a seat and at least two insertion apertures, the body comprising at least two aperture contacts (708-711, 620, 622), each aperture contact being associated with one of the insertion apertures, wherein each of the aperture contacts comprises a closed loop of biocompatible, inert, conductive material configured and arranged to electrically couple to a terminal of an elongated member when the elongated member is inserted into the associated insertion aperture; a first end plate positioned at the first end of the assembly of individual contact modules; a plurality of seal plates formed from a non-conductive material, a different one of the plurality of seal plates being disposed in the seat of an associated one of the contact modules such that the seal plate is sandwiched between the associated contact module and one other contact module of the assembly or the first end plate, and each seal plate is disposed in the seat such that the seal plate does not extend beyond the plane of the body, and wherein each seal plate is configured and arranged to electrically isolate the aperture contacts of the associated contact module from the aperture contacts of the other contact modules; and a second end plate positioned at the second end of the assembly of individual contact modules, the second end plate coupled to the first end plate by a retaining mechanism and configured and arranged to facilitate arrangement of the assembly along the common axis. an assembly of individual contact modules arranged along a common axis and formed from a biocompatible, rigid, non-conductive material, the assembly having a first end and a second end, each contact module comprising a body having a first major surface and an opposing second major surface, the first major surface defining a seat and at least two insertion apertures, the body comprising at least two aperture contacts (708-711, 620, 622), each aperture contact being associated with one of the insertion apertures, wherein each of the aperture contacts comprises a closed loop of biocompatible, inert, conductive material configured and arranged to electrically couple to a terminal of an elongated member when the elongated member is inserted into the associated insertion aperture; a first end plate positioned at the first end of the assembly of individual contact modules; a plurality of seal plates formed from a non-conductive material, a different one of the plurality of seal plates being disposed in the seat of an associated one of the contact modules such that the seal plate is sandwiched between the associated contact module and one other contact module of the assembly or the first end plate, and each seal plate is disposed in the seat such that the seal plate does not extend beyond the plane of the body, and wherein each seal plate is configured and arranged to electrically isolate the aperture contacts of the associated contact module from the aperture contacts of the other contact modules; and a second end plate positioned at the second end of the assembly of individual contact modules, the second end plate coupled to the first end plate by a retaining mechanism and configured and arranged to facilitate arrangement of the assembly along the common axis.