Ecobee ecobee3 lite - Step 18: Mount Backplate with Wires; Step 19: Connect PEK Wiring to Terminals

First, connect these 3 wires as shown:
Then, connect any remaining wires to their
corresponding terminal.
STEP 18
Pull the wires through the hole in the
middle of the backplate and then attach it
to the wall using the drywall anchors and
screws provided.
TIP:
Use a 3/16” drill bit to drill a hole for the drywall plugs.
STEP 19
TIP:
Press the terminal block levers to insert the wires more easily.
PEK
W2
W1
R
H
Rc
G
Y1
Y2
O/B
C
Rc
G
W/W1
Y/Y1
Rc
G
Y1
Rc
G
Y1
Y2
Rc
G
Y/Y1
W/W1
R/Rc/Rh Rc G C Y PEK