Many thanks for the pics and info offer.
My service manual describes with images pretty well every aspect of remove/fit on the charge components but doesn't mention how the cable exits the "control panel" bit of the lower cowling.
Here is an image of the charge kit for mine.
On the grey leads there are plug/socket connectors and I'd hoped the socket mounted on the front panel then it would be an easy disconnect with the plug on a lead that could be wound up with the battery when packing away. Perhaps wait until the outboard is here in front of me before I order.