Presented herein are apparatuses for use in capillary separations. An apparatus includes a coupling that integrates a capillary with a voltage source, a sheath liquid system, a fluid exit port, and a manifold. The coupling may be an elbow connector or equivalent. The manifold receives incident light from an incident light input, and emitted light is collected by a collected light output. The capillary enters the manifold at an input for the capillary, traverses the coupling, and terminates at the fluid exit port, for example an electrospray emitter. The capillary may also enter the manifold at an input for the capillary and terminates inside the manifold.