Pension Insurance Number - Infotype 0013

We are in the process of entering more HR data in SAP for our Germany employees. We do not use SAP Payroll or Benefits, however we will be interfacing data to a third-party payroll system. While configuring infotype 0013, I have discovered several fields need to be populated before I can maintain the pension insurance number (i.e. HI Indicator, PI Indicator, UI Indicator, CI Indicator, Health Ins. Fund, etc.). I am having a hard time gaining access to the data that should populate these fields, and it doesn't seem possible to make these fields optional. Does anyone have any suggestions on how I can populate the pension insurance number without the need to maintain other fields on this infotype? Thank you very much for your help.

Lori