mobile power

Hi all, looking for a little help retrofitting the gsm module to my t6 Need help with the wiring in, so far I have red/blue to fuse c18 Brown to earth point So need help with yellow/red and yellow/blue Any help is appreciated thanks

So this arrived today. My leisure battery set up is now 5 years old and the battery is coming to the end of its days. Also my inverter has now packed up. I’ve priced up a new battery & Inverter and that came to just under £1,000.00 So, I’ve decided to go down the road of a mobile power bank and...