Previous machine and configurations are unavailable sounds like this case. Sound right?
If so, one thing I would add is that the Sources don’t need to be perfect at first, as you’re not immediately going to run a backup. First thing is to get the Database recreated using Repair. You can then Restore files or compare (if already on laptop) with tree in Restore. Rearrange as desired, then edit job Source config to reflect whatever the desired plan is.
If the job had things like Filters and Advanced options, these will have to be set up again. Complicated jobs are worth an export and save. Simpler ones can be handled per above.