Splicing Laser vang primary to top block and middle block

I am working on splicing laser rigging for a boat. I want to splice the primary onto the middle block and the upper harken wire block, but I've run into issues. In all of the Brummel lock splicing videos I have seen ( for example), the loop cannot be made around something because to create the lock you have to pull the loop through the line. My question is: Is there a way to create a Brummel lock around both the middle and upper block without creating a loop separately...

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