Disclosed is an apparatus for optimally interconnecting a plurality of N electrical endpoints. The apparatus comprises a substrate having a number of terminals equal to at least the number required to short one or more unique pairs of the N endpoints. For example, to enable all combinations of two endpoints to be made between N endpoints, the apparatus comprises N(N−1)/2 terminals. Each terminal comprises a first contact coupled to a first endpoint and a second contact coupled to a second endpoint. The first contact and second contact of any terminal can be shorted to connect their corresponding endpoints. The terminals may be disposed on any side of the substrate.