Salesforce CPQ will automatically populate field values between certain objects when their API names match.
Fields and data that will auto-map when API names match:
Checking the Configuration Attribute checkbox field on an attribute record will map that attribute value to quote lines that are product options of the related bundle.
Managed Package Fields (ex: SBQQ__NetPrice__c) cannot be twinned with the auto-mapping feature. However, one can create a formula field to return currency with the formula of "SBQQ__NetPrice__c" and subsequently create a currency field on the opportunity product with the same name and API. This will auto-map because the formula data return type is identical to the field data type of the destination field.