L.B. White 300 Director - Manual (Page 10)

a) Push latch away from thermostat socket on control
panel and remove cover from thermostat socket.
See Fig.5a
b) Connect thermostat plug to socket. Lock plug to
socket using latch. See Fig. 5b.
FIG. 5 a.
FIG. 5 b.
CONNECTING THERMOSTAT
(Accessory - Part #27508)
14 9
LATCH
COVER