Clio 197 - subframe - help

[jamesC172]

So in a attempt to gain some access to my manifold I have removed a part, that I now cannot replace. Two nuts sit in the subframe itself have moved and I cannot access so what I want to know is, the piece pictured... is it important and can I leave it off... looks to me like a skid plate of sorts and has no handling related or strength related uses

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