Toro RT1200 Installation Instructions Manual page 9

Connect the tee valve to the port as shown.
Connect the existing hose from the trencher motor fitting to the tee valve as shown.
Installing the Plow
Install the plow per the figures below.
1x 5x 6x 12x
(1 x 4-1/2 inches) (1 x 3-1/2 inches) (1 inch)
9