Hi Andrew,
Not so much of an idiots guide, I will try and help out where possible.
Step 1 - Power the device. - You can power via USB-C or from one of the rear power cables.
If you use rear power cable, you need to press a reassessed button on side of the device to get it to boot.
Step 2 - go into menu, - 3 dots on bottom.
Step 3 - Enable Wifi
Step 4 - find the wifi hotspot named ChargeScreen, - you can use your phone or mac/pc.
The hotspot hopefully will automagically open up the page, but if it doesn’t - the address of the device is
http://192.168.4.1 - enter this into a web browser.
Step 5 - Select the devices you own, after you select the devices, if the device needs a key, then it will spawn a box to enter the key.
You can get victron keys as per the image.
Step 6 - Click Save at the bottom of the page.
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