Subwoofer high-level connection question

Sorry for what might seem like a silly question, but I'd rather look silly than cause any kind of damage.  If I'm connecting an REL sub via high-level connection to a tube amp without multiple sets of speaker terminals, the sub ends up using the same terminals the mains are already connected to. If my speakers are connected via spades and the REL uses bare wire, it seems they are going to end up touching.

Is it any kind of issue if the spades from the main speakers are touching the bare wire for the REL at the speaker terminal they are both connected to?

Thanks