The Canare 4S11 Star Quad Speaker Cable is a single dual-banana cable, with two connectors at both ends.

Maybe this might have something to do with it ... https://support.psbspeakers.com/hc/en-us/articles/360000678208-Removing-Binding-Post-Caps

That is not their intended use. They are not made for installation work. They are made to use outside the wall in your home. Canare makes an excellent product and I think part of the design is made to be seen. How you use them is up to you.

The Audio Engine A5+ ship with 12 feet of 16AWG cable to connect the speakers together, however the binding posts will accept a banana plug terminated cable as well.

These are Canare brand cables.

This Star Quad speaker cable is assembled with four internal conductor wires which are each constructed with 11 AWG, stranded annealed copper conductors.

Annealing is a heat treating process that makes copper wire flexible and it also improves its conductivity -- the ability to send electronic signals through the wire. The internal copper wire conductors used to construct this audio cable are made up of individual thin strands that are bundled together to form one larger copper conductor wire which is then covered with insulation. While standard audio cables typically have two internal conductors, Star Quad cable is constructed with four separate conductors, each made up of bundles of stranded copper wires and insulated. The four-conductor construction of Star Quad cable is used to deliver a strong audio signal with high-quality sound that is free of external noise.

This is single cable with banana connectors on both ends. The cable is constructed with two sections -- the red side is for connecting the hot signal and the black side is for connecting to ground. This cable will connect to one speaker. You will need a second cable to connect your second speaker. This item (B&H # CA4S112B2B12) is one Canare 4S11 cable.