[JohnnieB]

You have the Veego 13V reducer, which has two 12V outputs.
1. High power (30A) 12V output that is switch on and off by remote ON wire.
This is the output that powers all the 12V accessories.

2. Low power (?A) 12V output that is stays on constantly.
This is the output that keeps the radio memory alive. I'm not familiar with how your Bluetooth connection works, but it might keep it alive also.

The 12V reducer itself is always on, the high power output is in standby until the remote on wire has pack voltage applied to it and the low power output is on all the time. The amount of power being drawn by the reducer is measured in milli-amps until the high power output is turned on and 12V accessories start drawing amps.

Unless the Run/Tow switch is in the Tow position, the PDS controller is on and drawing a few milli-amps.

The filter capacitors in the controller are always being kept charged via the pre-charge resistor connected between the large terminals on the solenoid, so a few milli-amps are being drawn from the battery pack to keep the filter capacitors charged.

In addition, lead-acid batteries self-discharge at about 1% of their storage capacity per day.

In other words, the battery pack is being discharged constantly anyways, so drawing a few more milli-amps doesn't make much difference in the overall scheme of things. If the cart isn't being used, you have to charge the batteries at least every 30 days, or use float charging to keep them charged.

Where and how you connect the 12V reducer's remote on wire only determines if the music plays with or without interruptions and that is yours to decide.