I have a pair of Quatros and had to switch to the smaller 7/16" spades on my MIT cables and even then they are still a very tight fit in the barrier strips. Vandersteen specifies spades no wider that 7/16".
As to your Galileo speaker cables, any banana to spade adapter would likely degrade their performance but would do in a pinch. Here is one option for your consideration... https://www.amazon.com/Hi-end-Adapter-Speaker-Connector-Wy-yp01/dp/B00X9FET7I
As to your Galileo speaker cables, any banana to spade adapter would likely degrade their performance but would do in a pinch. Here is one option for your consideration... https://www.amazon.com/Hi-end-Adapter-Speaker-Connector-Wy-yp01/dp/B00X9FET7I