Great! The controller with cylinder type battery is much easier to complete the controller mod, this is good.
I’m not home at the moment, will try to post pictures tonight or tomorrow showing the controller mod same as yours. With your particular mod, the power source will coming from the USB port. You’ll need to solder positive and negative wires to this port. This can be tough to do, Need a steady hand.
I’ll get back with the information/pictures you need, until then please review any information or videos from Solaris.
Hang in there
Paul
