How to add customized sound system for kabolite K963 RC hydraulic loader, powerful for loading

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Specification:
Manufacturer: Kabolite
Item Condition: New, Assembled and Painted
Scale: 1/16
Material: Metal, Plastic
Product Dimensions: 533x188x242 (MM)
Product Net Weight: 8.44 (KG)
Packaging Method: Outer Box + EPP Foam
Outer Box Size: 68x27.5x36.5 (CM)
Gross Weight: 12.06 (KG)
ID: KABO-K963-100-RTR-Y

The Package Includes:
1/16 RC Hydraulic Loader Model
Motor
Servo
ESC
Hydraulic System
Light System
FlySky ST8 Remote Controller and Receiver
Battery
Charger

The Package Does Not Include:
Sound System
Hydraulic Oil

Features:
1. Dual Motor Drive: Allows the tracked loader to move forward, backward, turn left, and turn right with precision.
2. Hydraulic System: The plow arm can be raised and lowered, and the arm, bucket, and plow are all operated by a hydraulic system for realistic movement.
3. Lighting System: Equipped with a comprehensive lighting system featuring three different lighting modes and four independent rotating light modes.
4. Detailed Design: The bucket, arm, and cabin exhibit exceptional detailing, including the hydraulic system, steering wheel, and side mirrors, providing a highly realistic appearance.
5. High-Quality Finish: Utilizes electrostatic and printing processes for various exterior elements, ensuring durability and a tactile, realistic texture that closely replicates the vehicle's appearance.
6. All-Metal Hydraulic Components: Constructed with full-metal hydraulic parts, making it a compact, portable, and sturdy hydraulic product suitable for its small scale.