You seem to be in the enviable position to write the profile, gents. The software's job is to do the calculations for brewing. New equipment profiles are a user community effort.
Essentially, the Speidel Braumeister is a Brew In a Bag (BIAB) system, where the bag has been replaced by a steel inner basket. This profile is roughed out as "Electric Urn (10 Gal/40 L) - BIAB." What's needed are the unique properties of the Braumeister.
Start by weighing the kettle and basket, together. Input that and then input the total kettle volume in the "Mash Tun Volume" field.
"Lauter Tun Deadspace" is the area between the basket and kettle. To simplify this, I'd just assume a full batch will be made every time. You already know the kettle volume, so just figure out the basket volume. Subtract that volume from the kettle volume to get your deadspace.
The rest of the profile is straight forward.
Once you have that all set, you can improve the overall quality of BeerSmith by posting the profile. Perhaps in "Tips" and/or "All Grain/Advanced" discussions.