Looks like I am going to answer my own question.
I have tested it and can confirm the mappings are as follows:
Macro Settings:
msoAutomationSecurityForceDisable = Disable all macros without notification
msoAutomationSecurityByUI = Disable all macros except digitally signed macros
msoAutomationSecurityLow = Enable all macros
To the best of my knowledge the global ActiveX settings can only be configured by directly editing the registry
ActiveX Disabled
[HKEY_CURRENT_USER\Software\Microsoft\Office\Common\Security] "DisableAllActiveX"=dword:00000001 "UFIControls"=dword:00000002
ActiveX Enabled with safe mode
[HKEY_CURRENT_USER\Software\Microsoft\Office\Common\Security] "DisableAllActiveX"=dword:00000000 "UFIControls"=dword:00000002
ActiveX Enabled without safe mode
[HKEY_CURRENT_USER\Software\Microsoft\Office\Common\Security] "DisableAllActiveX"=dword:00000000 "UFIControls"=dword:00000001
I have left a comment in the relevant section of the MSDN website