OK, I don't think Osculator is going to be useful here at all. But I'll include the following directions to get it talking a little to you for reference.
There is another way you can look into, try binding your device to the controls for the SL AU plugin from within Live, the Record (cmd), should change their state when recording is active or not and maybe you can get Live to send out a midi CC when it changes (which SL does internally). I'll give it a try later if you don't have luck....
FOR REFERENCE ONLY, not so useful.
You need to pick a unique port in osculator for the input (lets call it YOURPORT for the command below). Then, the tricky part, if you look in the SL installation DMG, you'll see a little program called slregister in there. Copy that into your main user directory. Then open a Terminal, and then run:
./slregister localhost YOURPORT 10051
You should start seeing some stuff coming into osculator then, but it doesn't make sense because of the way osculator is designed.