If your thick yellow wire (.157 bullet conn) is the hot to the voltmeter and the source for the keyswitch out (probably the blue), you can connect it to the red wire of the alarm power output, instead of the red feed to the controller. Much more elegant. The alarm power out red is always hot. On three controllers the alarm power output has been a red bodied connector with a red and black wire.
My voltmeter & keyswitch feed was green, but same connector.
The controllers I buy require a +dc to the "door switch" input to move. I've replaced the keyswitch (since the key broke and the throttle connector did not match with the new controller throttle input) with a toggle switch in a pill bottle I mounted under the seat. The controller uses more watthours idle with the door switch input turned on. So I turn it off when parked. Off also keeps vandals from doing burnouts of the tire with the bike cabled to a gas meter or cart rack.
Why the controller builders call the controller enable a "door switch" is a mystery to me. Certainly "ignition switch" is not appropriate, either, but that is what the function is called in cars.
You can buy .157" bullet connectors male & female from Dorman at an auto supply like Oreilly's. You use a crimp tool to install them on 16 or 14 ga wire. I prefer crimp tool from Klein or Ideal the the garbage tool sold by dorman or 1000 other vendors of sleaze. Dorman connectors (only the ones made in ******) are okay. The Dorman assortment of crimp connectors in the box are made in ***** and are trash.