If you are still wondering what I did..

I decided to place the RP504C directly on top of three floating shelf brackets. The center, when placed on the bracket, blends and makes it looks good.

Link to the bracket I used. (if interested)

Floating Shelf Brackets 14 Inch, Heavy Duty Black Floating Shelving Bracket, Wall Mounted Decorative Industrial Metal Brackets for Shelves, Set of 4 https://www.amazon.com/dp/B07P32L8KC/ref=cm_sw_r_cp_api_glt_fab

PS: I couldn’t post photos on this thread.