Solar trickle charge engine battery

That’s great, thanks for confirming. I wasn’t sure if I should use all the terminal connections of the ctek - but that will make the job much quicker!
Finally!! The battery master is all wired up using the ctek terminals. So far, since Sunday evening, the engine battery is up 12.5v and the led on the battery master is still red, so still topping up. Leisure batteries sitting at 13.5v with solar. Hopefully I’ll never have to worry about the van standing idle and getting it started again. Thank you all for all the advice, recommendations etc 😊 really appreciate it.