Here’s what I mean about tying the leads together. I’m using a banana coupler since I only have male banana plugs around.
Picture 3130 shows the plugs directly in the overhand knot. Easy to do and undo, but puts a lot of strain on the wire where it enters the plug body, especially under tension. Easily solved by putting zip ties onto it, one over each plug body, providing generous loops for strain relief. There are probably even better versions of this approach.
Picture 3131 shows an overhand knot made by holding both leads in parallel, creating strain relief far from the plugs. But it’s bulkier overall and harder to undo, especially if the leads have been pulled on a lot.