I've been given a pair of Yamy metal handguards ..but...it looks like I need the original bar ends for correct fitting???

I've got a set of plastic UFO's on at the moment & those are mounted without the bar ends. Before I start undoing nuts & bolts I wanted to confirm whether I need to use them or not(not to sure where the bar ends are )

Oh and I had a look through the gallery but couldnt find any close up pics.

__________________