The SAP .NET Connector needs to be installed on all clients and jobservers involved in the processing of SAP requests from Identity Manager (1IM) to SAP.
Install the new version somewhere, but don't select the option to install to global assembly cache because the dlls need to be visible.
Then take backups of the old dlls in all SAP job service installation folders and replace with the newer ones. This can be done manually or using the Software Loader.