There is no quick win with this, but I would develop an Epicor function to complete the operation.
If you use the tracing functionality in Epicor you should get an idea of the business objects to call and use these in your function.
Once you have the function working with whatever parameters you want (jobnum, assembly seq and related operation), then all you need to do is call the function via a Rest call from VS, with the correct authentication, if that is you chosen IDE.
If you are very new to Epicor development, it might be worth giving yourself a simple exercise like updating a customer name and try and do that via an Epicor function.