Wiring this utility trailer kit with poor instructions. Are these blue clips to splice the side lamp wire, or for something else? How do they work? Is there a better way ?

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Wiring this utility trailer kit with poor instructions. Are these blue clips to splice the side lamp wire, or for something else? How do they work? Is there a better way ?

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【ITEM TYPE】This is our SUZCO custom-made vehicle-specific 50FT male & female 4-flat marine trailer wiring harness with 4-way conductors and a 4' white

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