2nd battery isolator.

[Canny lad]

Where about have you fitted the VSR for your 2nd battery.
Also what type of fuse have you used.
Any pictures would be appreciated.

[NowForThe5th]

Have you tried here?

[Canny lad]

Yes I did. No Help

[NowForThe5th]

Right. Sure you did.

Here's a direct link to the first item in that search after your opening post in this thread. Some discussion on isolator positioning as well as some pictures in that thread.

Or you could change the search terms a little to narrow the hits down a bit. Like this or this. I'm sure there are more variants....

As for the fuse, well a pic of the mount in that link above. A fuse is a fuse and there'll be a million arguments for and against different types but at the end of the day amperage is what matters. 40A or above depending on your system and, again as covered in the link above, as close as practicable to the starting battery with a second one close to the auxiliary battery.