When the standard servo wire isn't long enough to reach, you'll need these extension cables that come in a variety of sizes.
Items [18]
12IN Aileron Servo Extension w/Gold Pins
Price: $6.97
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Product# HRC54604S

12IN Servo Extension
Price: $3.99
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Product# JSP98030

6IN Aileron Servo Extension w/Gold Pins
Price: $6.57
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Product# HRC54603S

TX/RX Audio Programming Cable
Price: $10.99
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Product# SPMA3081

New Hobby Express Product!
TX/RX USB Programming Cable
Price: $15.99
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Product# SPMA3065

Hitec Extensions.
12IN Aileron Servo Extension
Price: $5.97
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Product# HRC57345S

24IN Aileron Servo Extension w/Gold Pins
Price: $8.97
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Product# HRC54605S

24IN Aileron Extension
Price: $6.97
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Product# HRC57346S

36IN Servo Extension
Price: $7.97
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Product# HRC57347S

Other Extensions.
Heavy-Duty Servo Extension 6IN
Price: $5.99
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Product# SPMA3001

New Hobby Express Product!
Servo Extension 9IN Standard Gold
Price: $8.49
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Product# JRPA096

Heavy-Duty Servo Extension 12IN
Price: $6.99
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Product# SPMA3003

Standard Servo Extension 12IN
Price: $5.99
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Product# SPMA3053

18IN Servo Extension Lightweight
Price: $3.99
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Product# EFLREX18L

Flap Servo Extension (305mm)
Price: $4.99
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Product# PKZ5404

6IN Extension Lightweight
Price: $3.19
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Product# EFLREX6L

Extension Leads Safety Knot 10 Pcs Per Bag
Price: $7.99
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Product# MT4016

6IN Servo Extension Cable
Price: $5.57
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Product# HRC57344S