Alright, so here is the funny part of the story. Behind the console is a plastic part which comes off with 2 screws. There's a cable there that is marked as optional, no idea why, but I'm looking at it, and it has kind of two power plugs, it's for an extra TV which can be connected to the device on top of the console. At first looks I ignored this, there's a few cables they left inside the frame due to the frame being used for multiple different modules which include a lot of different elements like network and coax.
I took a look at the board end under the seat, and there are two options there, there is an empty compartment for a large 15amp power supply for powered operation with a touch screen. There is instructions in the book to if you want to add this part you have to unplug a cord at the bottom which is plugged into the internal battery circuit. This plug kind of looks like the cable from the other end, and that's where it clicked in my head. That's the power cord and at the console end, it's not plugged into anything.
So, I plugged it in, it's working, the battery was probably a waste of time. This is what I think happened, they mothballed the product at some point during one of the first few lockdowns, and they cut the power to the console so it wouldn't turn on occasionally and drain the battery.
And I scored a fully working exercise bike for $192 at auction. Good condition, suggest if you are looking for equipment take a look at gym liquidations.