Roger
I have a Jinma 354 with a LW7 BH. You can take the box (factory pump) with the hoses off of the rear of the tractor and there is a plate you can use as a cover after taking the pump off. If you bought the tractor new the dealer should have given you that plate. If you don't have on you can order one from Tommy, Harold, or Jerry at Affordable Tractor. I re-worked my hydraulics on my BH and installed a Prince pump so all I have to do now is disconnect the BH from the 3 point hitch and pull the pump off of the PTO spline.
Len.