PS4 ModChip Hardware Analysis and MTX Key Reseller List, today wholesaler Westingames made available a brief video detailing where to solder the MATRiX Key Gamesharing Mod in the PlayStation 4 CUH-10XXA series (SAA-001), CUH-11XXA series (SAB-001), CUH-12XXA series (SAC-001), PS4 Slim CUH-20XXB series (SAD-001) and PS4 Pro CUH-70XXA series (NVA-001) models via the English Installation Manual.
Also below is a PS4 MTX Key review from BALA MURUGAN although it's not in English.
Where to Solder PS4 MTX KEY on My Motherboard?
PS4 MTX KEY CHIP Install on PlayStation 4 Slim
PS4 MTX Key Review