THE WORLD MODELS 1/4 Piper J-3 Cub Instruction Manual page 15

Drill 2mm hole at servo horn.
A053PO28891307
LINKAGE CONNECTOR
HW7111050 & HW7111060
Shoulder
After fastening the round nut, make sure that
the linkage connector can rotate freely.
Make sure shoulder of
screw is cleared from
servo horn.
Add washer to reduce
play if necessary.
Tighten up the round nut
against the shoulder. Apply
CA or permanent thread
locker.
Insert linkage connector
into servo horn.