Battery flat - can’t find +/- clamps

I did have a quick search but suspect it’s such a stupid question that maybe no-one has asked before. My daughters 2008 Twingo seemingly has a flat battery this morning. We have a trickle charger so was planning to charge all day and see if that made any difference.

However, having removed the battery cover am struggling to locate him the +/- clamps - unlike any battery I’ve seen before. Any news where these may be located?

Thanks, Pete