Winter GSXR 600 K1 (empty carburettor)

Hello everyone here, I’m new here in the forum and I’m addressing you directly with a question… I bought my GSXR 600 K2 (built in 2002) this summer. Is my first motorcycle. I already made you winter party some time ago (putting, battery out, jacking up, …) but I’ve failed miserably when emptying the carburettor. ?? I found the carburettor, but there’s no trace of the drain screws…. It’s already very late and the ghosts st ride with the question, if this is necessary at all, but I would be interested in where I find the drain screws and how I best proceed to empty the carburetors. Maybe one of you can help me with photos or a description. Thank you already in advance! Friendly greeting, Bernd