Diagonal Connection With Two Pairs Of Binding Posts

This is from the Chord website:

"As a general rule, the treble connections are usually reckoned to produce better sound quality than the bass connections. However, in many cases, we find that a diagonal connection produces the most musically coherent sound. To do this, connect the positive (+) speaker cable to the positive treble connection and the negative speaker cable (-) to the negative bass connection. So in effect, the cable is connected diagonally. This is quick, easy and fun to do and the results are easy to hear."

I decided to try this today on my Harbeth SHL5+ speakers. Previously, my cables were connected to the lower posts (LF).

I listened to very familiar music for a couple of hours and the change was significant and for the better. The high frequencies were clearer without being bright. The soundstage was wider and overall sound had more presence.

I was not aware that a diagonal connection was an option.

Has anyone tried this? What were the results?

I left the jumpers in place. Should they stay in place in a diagonal set up?

Would appreciate your thoughts/comments.