Hi Sam,
oh ok its 2 piece veneer. There's a technique with kwik grip you lay the veneer down from the centre and roll the veneer onto the surface and try not to move it once it's made contact with the glue.
Might be safer to glue them separately. Draw the centreline and get one side as close as you can. Make sure there is a bit of play in the size of the veneer.
I realised you had cardboard ontop of the veneer in the photo