I've used the spade adapter for the purpose you seek. See the other thread below for more discussion. The inner channel of the compression sleeve is the same size, and it's machined like the banana jack on a 5-way binding post. BTW - the reviews surprise me, I've not had this problem (ie too narrow).
Dayton SPCO-GRB Compression Spade Pair
Spade/banana adapter discussion
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Dayton SPCO-GRB Compression Spade Pair
Spade/banana adapter discussion
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