If what you're saying is the "barriers" are too close together for the large spades to fit between them (and under the bolt head) then here's how I've solved it:
Remove one of the terminal bolts. It might have locking threads that keep it from coming all the way out, but whether it does or not, you can get it out with a little persistance.
Next go to Ace Hardware and get a longer version of the bolt, like a one inch. (It's probably an 8-32, bolt but whatever, get a one inch long version)
Next (and this is why I recommend Ace) ask for a 1/2 inch long nylon spacer with the same hole size as the bolt. Metal spacers are OK too, and might work better if the nylon one's outside diameter is too fat to go between the "barriers". But Ace usually has an assortment of both.
Slip the new bolt thru the spacer and insert back into the terminal strip. You can now attach the big spades to this nifty little "stand-off" without them having to go between the barriers. You might want to put a "star" type lock-washer at each end of the nylon spacer to keep things tight.
Hope this helps.
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