If you are unsure of the correct procedure YouTube is a good source of videos. In the majority of situations this is simple to do by attaching the flex cable to the main board. LCD screens should be fitted by professionals or people with competent knowledge and tools.
eBay
YUXI For PS2 SA1Q42A SA1Q43-A Ribbon Circuit Board Film Joystick Flex Cable Conductive Film For PS2 Controller
Aliexpress UK
eBay
5PCS For Sony PS2 SA1Q42A SA1Q43-A Ribbon Circuit Board Film Joystick Flex Cable Conductive Film For PS2 PS4 011 001 Controller
Aliexpress UK
Boxed without instruction manual. Disc is in very good condition
eBay
8BitDo Retro Receiver for PS1 PS2 and Windows, Compatible with Xbox Controller, Switch Pro and PS5/PS4 Controller
Aliexpress UK
KINGDOM HEARTS II PS2 GAME WITH MANUAL IN ACCEPTABLE CONDITION
eBay
2023 New PS2/PS3/PS4/PS5 Game Controller Holder Dual Gamepad Dock Mount for Xbox One Series S X Joypad Stand Switch Pro Rack
Aliexpress UK
KINGDOM HEARTS.
eBay
Batocera.Linux 37 OS Portable 128GB USB 3.0 Game Hard Disk 70+ Emulators For PS3/PS2/PS1/N64/XBOX/WII/DC with 43000+Retro Games
Aliexpress UK
eBay
TF Game Card For Retroid Pocket 2S RP 3+ Flip Memory PS2 PSP PS1 NGC 3DS Classic Retro Games portable Handheld Odin 2 ROG Steam
Aliexpress UK
Kingdom Hearts for the Sony PlayStation 2, released in 2002, is a European version of the popular role-playing game. Published by Sony, this game offers an immersive gaming experience with its manual included and memory support features. Players can delve into the game's engaging storyline, explore various worlds, and engage in strategic gameplay on their PlayStation 2 console. With its PAL region code, this game provides an exciting experience for fans of the Kingdom Hearts series.
eBay
100pcs/Pack CD Game Case Resealable OPP Plastic Bag Sleeves for Sony PS2 PS3 PS4 PS5 XBOX 360 XBOX ONE Storage Accessories
Aliexpress UK
It may have some wear and tear (or character, depending on how you look at it). Do not worry, it is still perfectly usable and our expert team have made sure there is no major damage – you are getting a great item for a great price!
eBay
JCD Game Controller Extension Cable Cord Wire For PS2 Black
Aliexpress UK