well...i'l led to believe that its a slide on type clip that sits under the centre console side covers of the dash.
If thats bin removed then theres probly one piece that was never put bak on....as these can sumtimes be tricky to get bak on...generally u wud put the clip bak in the hole of the framework under the panel 1st then u wud bent the plastic cover to a degree to get it to sit bak in place onto that hook.
Or it jus may comfortably jus slide onto it. Perhaps the previous owner or whoever left it there had that as a spare and u dont actually need it. but it is a cabin trim clip!?