I believe the only purpose for the extra set of spades and the jumper plate is for when you simply want to connect a single cable (not biwire) to the speakers.
In that case, from your Amp connect a single run cable to the bottom spades put the jumper plate in place and then use the supplied Von Schweilkert cord to connect the top unit to the bottom unit.
You also could connect a single wire from your Amp to the spk bottom spades , use the jumper plate and then connect another short wire from the top bottom spades of the lower module to the upper module spk inputs. (not using the Von Schweikert supplied cord).
Confusing ?? Not really went you try it.
In that case, from your Amp connect a single run cable to the bottom spades put the jumper plate in place and then use the supplied Von Schweilkert cord to connect the top unit to the bottom unit.
You also could connect a single wire from your Amp to the spk bottom spades , use the jumper plate and then connect another short wire from the top bottom spades of the lower module to the upper module spk inputs. (not using the Von Schweikert supplied cord).
Confusing ?? Not really went you try it.