Fiat Ducato headlamp globes are type H7 but most accessory LED spot lights come with kits for vehicles with H4 globes - this video shows my work-around and shows you every step of the install process. A fun project for the morning.
I don't mean to be negative (pun intended) but I expect you'll have a problem sooner or later with that connection to the headlight. There's a fair bit of current and heat in there, and you need a really solid connection for it to be durable. A previous owner of my car made a headlamp connection much as you've done, and the poor connection heated up, melted the cabling and made a real mess.
@@VanHacks thank you. Regarding your light fitting, I assume the final part where you fitted the switch can be ignored if you only wish to wire it up to when the full beam is on?
Did not buy another harness, used the one that came with the light, just had to connect the cable to the headlight the old-fashioned way.. thanks for yr question..