True biwiring was made if you wires from the internal Xover had a separate wire from the Xover to the loudspeaker terminal, upgrading many speakers
most biwiring on the terminals is fake ,a selling point
get rid ofthe stock jumpers if they are metal straps pure junk. You want agood quality wire and quality connectors copper is far better then cheap Brass which most are unless you have say WBT connectors ,I have found if you connect the Speaker cables to the bottom you get a bit more if-you