How to add sound system for kabolite K961-100s RC hydraulic excavator with electric grab hammer

here is the link from my shop website,
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If you have any questions or are not sure whether it is the correct item you want, pls feel free to contact me before purchasing. please add my Facebook: Oliver Lan , www.facebook.c... ,or WhatsApp [phone]
Note: After repeated verification and validation by the manufacturer, it was determined that the scale of this model is actually closer to 1/18 of a real machine, so the manufacturer, out of caution, changed the scale of the model from 1/16 to 1/18. However, the actual size and dimensions of the model are the same as the original K336GC.
Specification:
Manufacturer: Kabolite
Item Condition: New, Assembled and Painted
Scale: 1/18
Material: Metal, Plastic
Length: 622.6mm
Width: 193.7mm
Height: 214.5mm
Product Weight: 8.9Kg
The Package Includes:
1/18 RC Hydraulic Excavator Model
Motor
Servo
ESC
Hydraulic System
Light System
Ripper
Electric Breaker Hammer
Electric Claw
Manual Quick-release Coupler
FlySky ST8 Remote Controller and Receiver
Battery
Charger
The Package Doesn't Includes:
Hydraulic Oil
Sound System
As the upgraded version of K336GC, K961S has the following improvements:
1. The color is changed from yellow to white.
2. The remote control is changed from FlySky I6S to FlySky ST8.
3. The material of the oil pipe is changed from plastic to metal.
4. Compared with K336GC, the K961S increases more upgraded parts of a quick-release coupler, a breaker hammer, a ripper and a claw, which makes the excavator multi-functional.
5. The hydraulic system is upgraded to a higher quality and more stable system.
6. The material of the fuel tank is upgraded from aluminum alloy to stainless steel.
7. The power board, electric control board and light board are integrated into a circuit board.
8. The rotating disc of the excavator is upgraded to a large bearing structure.
9. The windows of the cabin are changed from fully transparent to transparent green

[@toucanhobby2400]

here is the link from my shop website,
oliverhobby.com/products/kabo-k961-100s-rtr-w-spf7?_pos=2&_sid=be0ec0241&_ss=r&variant=43561329164477
If you have any questions or are not sure whether it is the correct item you want, pls feel free to contact me before purchasing. please add my Facebook: Oliver Lan , facebook.com/profile.php?id=100083176249155&mibextid=YMEMSu ,or WhatsApp [phone]

[@toucanhobby2400]

Thank you for your follow, for future detailed video will post to My new TH-cam channel name: Oliverhobby , link youtube.com/@oliverlan001?si=KzR4sg8D22bM3AN7 , please add my Facebook: Oliver Lan , facebook.com/profile.php?id=100083176249155&mibextid=YMEMSu ,or WhatsApp [phone] ， [e-mail]

[@pecintaalatberat4555]

Keren bang

[@hhtrichard]

Where did you mount the speaker?

[@toucanhobby2400]

Under right side front cover