Component parts of a tube rod batten:
Picture below showing, from the top:
2 plastic connectors
Batten connectors can be found in :
Heat sealed plastic needs to be removed, to separate connectors.
Try to saw straight, for butting up with connector.
You can get spare parts from me.
I can make you a replacement batten ,or you can make your own ?
Broken Batten in cam webbing - click below.
http://www.jonnieeisler.com/shop-windsurfing_sail_components.html