I don't have to take my speakers off to fold my tower down so I don't have that problem. I do use a plug between the tower. I used Tyco Amp connectors and they work well, but get pricey when you add up all the components. You might look at powerpole connectors. They can be configured and they give good current capacity.
They are not the only place to buy them, but that is what I am talking about.