Yes, the system has that covered. It just needs you to enter a little more information.
To enter an S2S QSO manually go to the screen for entering a chase - Submit Chase/S2S/SWL Entry. After all, you are chasing the other summit.
Proceed as normal, entering the details for the remote summit in section (a) and then the QSO details in section (b). The difference comes when you tick the box for S2S, which will reveal section © where you enter the details for the remote summit.
Once you start getting lots of these (!) you may want to import from a CSV file instead. A logging program such as Saisie SOTA will output the files for you. Saisie SOTA now outputs two CSVs; one you import to the database through Import Activator TSV/CSV and the other with Import Chaser TSV/CSV.
Once you’ve got your S2S QSOs logged onto the database you’ll be able to see them in your Summit to Summit Log under My Results. You’ll also appear on the Summit to Summit Roll of Honour