Impala/Caprice Installation Page 12
Now install the control box. The control box shown has the older style connectors, yours may have the new white plastic connectors.
Connect the tail light plugs to the control box, remember to connect blue to blue and red to red.
Wrap the connectors around the top of the control box as shown.
Stuff the control box back into this corner as shown, making sure the tail light connectors remain on top of the control box.