I am trying to manually add ThamesLink journey from St Pancras to London Bridge because the Eurail app does not show trains. I have done this previously about 2 years ago but don't remember exactly how it's done.
The Eurail app gives the following screen on starting manual addition:

I entered the times approximately and train number is optional. Is this enough to generate a valid ticket or should I get exact train times from the ThamesLink app as below and put in exact departure and arrival times?

Thanks in advance for your time!