Apply some 5-min epoxy and microballoons mix to the corners
between the servo and the pocket walls. Try to avoid getting epoxy
onto the top skin, or it may warp the top skin when epoxy shrinks a
little. Also, removing servos (if needed for repair) will be
problematic.
A connector for the wing is optional, but it helps greatly if you are
planning to disassemble the model for transportation frequently as
most people do. A simple option for the wing connector is to use a 4
pin section of a circuit board pin strip. Mark the location of the servo
wire channel and the connector on a piece of a masking tape. The
recommended position for the connector is near the side of the
fuselage, to leave the space in the middle for ballast and control
lines.
The line shows the approximate location of the wire channels and is
drawn by connecting the corners of the servo pockets, where the
wire channels are visible. The connector slot must be located on or
near the wire channel. Make a slot in the wing for one part of the
connector. Verify that the servo wire channels open up into the slot
and are clear of glue.
Transfer the location onto the fuselage.