[dwcsr]

The boost unit should dump directly into the pump. The return from the steering box should also dump directly into the pump. You should have a 3 line pump. one pressure and two returns so you don't pressurize the return system with either of the units.

Pump pressure is the thread in fitting goes to the boost unit pressure side, the boost unit pressure out goes to the pressure in on the box. Return from the boost unit goes to one of the pump returns. The box return goes to the cooler and then to the other pump return