Using a participant with an "array of files" annotation as input to a workflow

I have a WDL (https://portal.firecloud.org/#methods/aryeelab/preprocess_hic/1) that runs locally and operates on two array of file inputs. (The samples were sequenced multiple times, and thus have multiple FASTQs associated with them). The WDL takes as input:

        Array[File] r1_fastq
        Array[File] r2_fastq

The corresponding input json contains:

  "preprocess_hic.hicpro.r1_fastq": ["test_data/hic/imr90_small/SRR1658672_1.small.fastq.gz", "test_data/hic/imr90_small/SRR1658673_1.small.fastq.gz"],
  "preprocess_hic.hicpro.r2_fastq": ["test_data/hic/imr90_small/SRR1658672_2.small.fastq.gz", "test_data/hic/imr90_small/SRR1658673_2.small.fastq.gz"],

How should I specify these Array[Files] in the metadata TSV I upload to Firecloud?