A configurable modular work space for a wiring harness assembly system comprises a computerized wire harness system controller and bulk wire supplies associated with a programmable discrete wire inventory retainer.One or more multiple wire pull-through mass terminators and a sequential wire termination apparatus are positioned proximal to a universal wire harness board, with a programmable mass terminator tooling unit cutting wire to length during a mass termination cycle. The multiple wire pull-through mass terminator leads to a first IDT connector nest, and then onto the universal wire harness board.A universal wire harness board comprises a floating pin board assembly positioned to interface with a second IDT connector nest, and the floating pin board assembly comprises a plurality of floating pins arranged in an array, which may be individually locked in extended or retracted positions for receiving wires during assembly of a wire harness according to wire harness specifications.