Greetings Linda,
The Settlement Rules are saved in the tables COBRA & COBRB. Get your Maintenance Plan Object Number from table MPOS and join on the field OBJNR using an SAP Query.
(SQVI or SQ00)
Also, note that these will be copied to the created Orders and the actual settlement only happens for the Orders. The settlement rule of the Maintenance Item is only a template, no actuals are involved.