Where is this meant to go!

[HeyT6]

Was looking under the van while on break in work and noticed this bolt! It was too dark for me to really have a decent look where it’s come from but hoping someone can identify where it’s come from!

 

[Psm1975]

Not sure where it’s from, but that looks like your starter motor. Make sure it doesn’t touch the +ve terminal!

 

[oldiebut goodie]

I may be wrong but it looks a bit like a battery clamp bolt - they tend to have that locating point on the end.
( I have a 10mm box spanner somewhere in my T-Cross engine that I haven't found in 5 years )

 

[HeyT6]

Need to have a better look in the morning when it’s light.

 

[Dundee_Kev]

Going by the length of the bolt, it does look like a starter motor bolt