After finding your desired mod, select it and then click the ‘Download: Manual’ button on the top right of the mod page. This will download the mod files and allow you to install them.

Read 2 spots for SRR390728 Written 2 spots for SRR390728 @SRR390728.1 1 length=72 CATTCTTCACGTAGTTCTCGAGCCTTGGTTTTCAGCGATGGAGAATGACTTTGACAAGCTGAGAGAAGNTNC +SRR390728 ...