Best way to find force in bolted connection

Yes, you could add tied contact there and check the total forces: Calculation of Shear and Normal Forces on a Cylindrical Contact Surface - CalculiX (official versions are on www.calculix.de, the official GitHub repository is at https://github.com/Dhondtguido/CalculiX).

Or use *SECTION PRINT if it’s modeled as a single compound part. Section print is not supported in PrePoMax yet but can be added using the Keyword Editor: Section print in history outputs