Confirmation of PM activity types in Plant Maintenance or Controlling

Hi,

Can anyone tell me if there is a possibility to Confirm activity types of PM workers on PM orders? Which transaction is used for this?

I would like to settle indirect costs of PM Cost center to PM orders. The tracing factor in this case would be the PM activity types confirmed by the PM workers.

However, I don't know the PM module and I don't know whether it's possible to confirm activity types using some PM T-code?

Should I use for this purpose KB21N (enter direct activity allocation) in Controlling, or is confirmation done somewhere in PM module?

Best wishes,

Karol