2017 F800 battery swap

So my oem was at 11.9V not enough to start the engine. These 2017 F800GS have a large relay connecter with tubes wires left hand right on top of the battery clamp. The clamp wont lift away ( have removed the 2 screws) until you move the mentioned cabling atop. Not easy to see hoe this is done, utubing shows older bikes dont have as much stuff on the bracket so not the same as 2017. Anyway charged the oem in situ to 12.5 started ok have put it back together and will keep the lithium until I figure how to get the clamp off.

So I got a copy of the maint CD which covers late models u have to separate 2 of the 3 electrical connector on the clamp easier said than done.

So with the CD guidance I managed to change it. Unsecuring all the wires was hard without breaking anything. Battery and restraint with all the cable typical german over engineers. The oem Battery is heavy as a car battery and I have crash bars so the bike was top heavy. Lighter now but I need to lose a stone in weight my self.