How to fit a smart battery relay charge controller thingy. easy

I mentioned in the video that the battery wire has hundreds an hundreds of fin wires... it was a tiring day 🙄
I thing that red wire has something like 250 strands in it... could be wrong cause I didn't count them.
anyways it's got loads compared to household wire.
this makes it very flexible .
I did leave the box with the relay and wire out overnight... I didn't leave it out in the rain overnight to check if it was water resistant 🤣
I simply forgot to chuck it in the van 🙄
anyways. I hope parts of the vid were useful to some of you..