There's one more pair of thrusters to install. Look on Parts Sheet B, for two thrusters labelled SIDE. For reference, the exhaust of the these thrusters is toward the word SIDE (and out to the left). With this in mind, release one SIDE thruster from the sheet.
Find the slot in the middle of the SOLAR PANEL, in a gold rectangle between holes G and M. Apply some glue to the white end of the thruster, and insert the white end through the slot, with its exhaust in the direction of hole G. Bring it into contact with the SPACECRAFT BUS. Apply a little more glue where it passes through the SOLAR PANEL.
Release the other SIDE thruster from Parts Sheet B. Install it in the slot between holes A and G, with its exhaust also in the direction of hole G.