caddy tails for a ranger ?

Im working on getting my caddy tail lights installed, and i have a question for anybody that can help me...... Once i install them will they be able to connect the lights to my stock wiring harness, or do i have to buy a whole new one?

If someone who has installed some or knows how to hook them up let me know....and i will give you an imaginary high 5 cause your awesome. All information is helpful