I see two large metal hooks to either side of the tire on the side of the trunk, maybe use those with a cargo net or just a nylon strap?
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'10 E90 335i | Black Sapphire Metallic | Black Dakota Leather | M Sport | Premium | Cold Weather
Cobb AP Stage 1 | Alpina B3 TCU | DCI | CF Splitters | CF Performance Spoiler | CF Trim
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