Help wiring amp & head unit to leisure battery

Tom Keyte Newbie
Jun 6, 2019
Hi, thanks in advance for any help. I've added a leisure battery to my van, using the wiring in this video:

I have this amp: and this head unit:

I'm assuming the head unit will be fine if I wire it in to the fuse block (this one:

Should I re-wire the permanent or ignition switched terminal from the back of the head unit to the fuse block.

And my main question...

For the amp, Should I be connecting that via 16mm cable straight to the battery (or to the isolator switch in this case) and does it need its own fuse.