Complex sentence: Not all connectors are joined to wires as shown in the figure; some connectors may be populated with contacts whose non-mating ends feature solder tails rather than openings for wires so that the contacts may be joined directly to a printed wiring board.
Split into simpler sentences: Not all connectors are joined to wires as shown in the figure. For example, some connectors may be populated with contacts whose non-mating ends feature solder tails rather than openings for wires so that the contacts may be joined directly to a printed wiring board.