Help me with my lighting set up please.

I have one flashgun that I can't trigger off camera at the moment. for this I swivelled it right, and used a piece of black card to keep direct light off the bottle and keep the background dark. There's a reflector just off to the right. I think the left is too dark but light from any reflector I put off the left ended up looking suspiciously like a hand holding a sheet of white paper, or else it was hidden behind my black card and didn't do anything. Am I missing any tricks?

I have one flashgun that I can't trigger off camera at the moment. for this I swivelled it right, and used a piece of black card to keep direct light off the bottle and keep the background dark. There's a reflector just off to the right. I think the left is too dark but light from any reflector I put off the left ended up looking suspiciously like a hand holding a sheet of white paper, or else it was hidden behind my black card and didn't do anything. Am I missing any tricks?