I'll take some pics and post them.
It's quite easy.
1- Powering: Only replace red cable by an ordinary 9v battery connector.
2- Grounding connection: Controller print works with a voltage regulator to 5 v, the same as Ninco console.
We must set the same GND reference to both prints: Every print has +5 stabilized volts respect to their respective sources.
Ninco console print: +5v is black wire in RJ9 phone jack (take a look at your original Ninco controller)
SCP01 controller digital cartridge print: I'll show you where get +5v.
Notice that in SCP01 Ninco cable, this wire is missing (not connected on RJ9 phone jack)
The work consists in removing RJ9 jack and crimp another one including the red wire from RJ45 inside the digital cartridge. The trouble is that red wire has to be placed in unnatural position on the other edge of cable, beside the blue one (Trigger position).
Into the digital cartridge you must weld a little wire from a +5v level point to the RJ45 pin corresponding to red wire.
This wire, the red one, will be the way for equipotential Controller-Console grounding reference.
There are other ways to do it, it's up to you, decide.
I tested the wrong sequence of connection order to the console several times, even removing the 1K resistor welded on lane change wire (green), on the second Ninco SCP01 cable edition where Slot.it solved the problem of blowing up, and the console remains in perfect condition. I think it's better to keep the resistor on.
I don't know how many hours can work SCP01 using an ordinary alkaline 9v battery. If somedody use this powering system for other digital systems could give us this information.
To keep in mind, obviously the controller doesn't work if it isn't powered (hall sensor and chips) and when the battery it's in its final life and can't supply power enough the car loses control.
Some pictures later... or tomorrow ....
Regards