Changing in line fuse on a T4 Trident

Hello, 

After recently getting solar panels fitted to my new (to me) T4 Trident I think I have blown the online fuse from the leisure battery to the interior electrics. I know there is a fuse somewhere near the battery. It is a new van to me so still getting to know it.

Can anyone tell me where I may find the fuse, what kind I will need as a replacement, and how is this done?

I've made some suggestions in your other thread:

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