The nearest you get to a Haynes manual for pre CX trad morgans is gomog.
www.gomog.com
There are links in there for handbooks for some models.
It is possible to get a Haynes manual for a car that used the engine in your model too but only the engine and even then there might be some modifications to some parts.
The Cobra high brake light......
I have one on my Plus Four, not the ones built into the hood. If carrying a suitcase on the rack it gets obscured so mine has a mod...Superseal connectors to allow disconnecting it and fitting an aftermarket LED brake light onto the suitcase, maintaining the extra light set up. When suitcase is removed it's a simple job to plug it back in.


Plus Four MY23 Furka Rouge