Model Tech P-47 Thunderbolt Instructions For Final Assembly page 48

Step 2: Installing the Servo Cover Assemblies
Turn the wing over and remove the covering material from over the two servo lead exit holes in the top of the wing.
Each hole is 5/8" in diameter and is located 1-3/4" out from the centerline of the wing and 7-3/8" in front of the trailing edge.
Install one 12" servo extension lead onto each of the two aileron servo leads.
IMPORTANT
To prevent the servo leads from pulling apart during assembly, wrap the joint where the two connectors are plugged
together using masking tape.
Carefully feed the end of the servo extension lead through the paper tube in the wing (from within the hatch) and pull
it out through the hole in the top of the wing.
The paper tube is hard to see. It's under the wing sheeting, about 1/2" in front of the hatch.
Set the servo cover assembly in place, making sure that the servo arm is positioned toward the tip of the wing.
Because of the shape of the covers, they will fit only one way.
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Using a modeling knife, cut away and remove the cover-
ing material from over the two aileron servo hatches in the
bottom of the wing.
Use a couple of pieces of masking tape to hold the servo
cover assembly firmly in place.
Using a ruler and a pencil, measure in 3/32" from each
corner of the servo cover and draw a mark to locate the
positions of the four mounting screws.
Using a drill with a 5/64" drill bit, drill a pilot hole into
the servo cover and through the preinstalled mounting block
in the wing at the four locations you marked.
Be careful not to drill through the top of the wing.