I have a Ctek MX5.0 which is the same only cheaper than the Jaguar branded one.
It's very easy to connect. Bigbri published a handy photo of the connections in the following link:
https://www.ftypeforums.co.uk/viewtopic.php?f=27&t=1325&p=11106&hilit=CTEK#p11106
The batteries are under the floor/cover on the tight hand side of the boot. It remains connected, so there's no problem with losing any settings etc. All you need to do is remove the nuts shown in the photo and drop the charger cable eyelets onto the studs. I drilled a hole in the side of the lift out underfloor boot box. The box is made of thick tough plastic, so there's not much danger of it cracking.