Strange dents in tailgate!

[KernowLad]

My heart sank slightly as I saw a shallow dent at the top of the tailgate. That was until I noticed an identical one on the other side - both in line with the outer arrow of a strange pair of arrow stickers each side of the window. What on Earth are these for?!

 

[sebking]

Markers for the tailgate bike rack.
Seb

 

[KernowLad]

Markers for the tailgate bike rack.
Seb

Thanks! Rather a strange bit of design though!