Você está no diretório correto, as seções de registro são os arquivos sem extensões de arquivo, com exceção do HKCU, que é o NTUSER, arquivo de dados
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In the registry, there are hives that correspond to several files. Hives are a collection of keys, subkeys and values that contain the configurations for the operating system and programs. In the registry, there are 5 groups: HKEY_CLASSES_ROOT(HKCR), HKEY_CURRENT_USER(HKCU), HKEY_LOCAL_MACHINE(HKLM), HKEY_USERS(HKU), and HKEY_CURRENT_CONFIG(HKCC).
For the corresponding hives, you will see several types of extensions: no extension, .alt, .log, and .sav.
No Extension: The complete registry hive
.alt: An alternate copy of the registry hive
.log: A log of changes that have occurred within the registry hive
.sav: This is an automatic backup created from when a setup or program installation occurs.
Here are the corresponding files:
HKCC: System, System.alt, System.log, System.sav
HKCU: Ntuser.dat, Ntuser.dat.log
HKLMSAM: Sam, Sam.log, Sam.sav
HKLMSecurity: Security, Security.log, Security.sav
HKLMSoftware: Software, Software.log, Software.sav
HKLMSystem: System, System.alt, System.log, System.sav
HKU.DEFAULT: Default, Default.log, Default.sav