Wage type and Overtime hours both are different scenarios ...
Wage types :this is a basic element of payroll data. for ex : as we have our pay structure BASIC, HRA, Special allowance etc in HR payroll the wage types are defined for one pay tasks.
You can search for Wage types information in HR Payroll related data sources.
Overtime hours : this is some thing related to work hours booking/time sheet booking. Check the Cross-Application Time Sheet application.
Could you share the reporting requirement?
For better understanding on your report requirement first check with business and later contact your HR functional person who can give you clear idea on your requirement.
Regards
KP
.