Multiple iotawatt units

Hi all,

back when i purchased my unit (jan 2021) i can remember seeing some information and pictures of 2 iotawatt units joined by what seemed to be a ribbon cable or something.

it was to get more than the 14 channels that are on the standard unit.

Now, upon looking for this now 1 year later, i for the life of me can not find it, as all i remember was a picture and the general jist was to get more channels on a single unit.

Can someone please link me to that, or provide any information on that project??