STI UB-2 - Manual (Page 5)

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INSTALL OR REMOVE CONTACT BLOCK
3
BUTTON ACTIVATED
M
TOP TAB
A
B
STEP A COMPLETED
STEP B
STEP A
STEP C
REMOVE
Repeat STEP A for the top and bottom tab before removing contact block.
Step A: Position small flat screwdriver blade under tab and gently rotate
until tab disengages. The contact block will rotate a little. Do NOT pull yet.
Step B: Repeat for opposite tab.
Step C: When both tabs are disengaged, pull the contact block straight off.
INSTALL
To attach, align tabs (as shown) and gently
snap top, then bottom. Be sure to hear BOTH
tabs snap into place. (Can be reversed if
wiring comes from the top of the box.)