Insert the hitch lock from reference image 1 into the rear horizontal lock hole of the hitch adapter shown in reference image 2. The adapter in image 2 must remain exactly the same as the original: keep the exact product shape, structure, proportions, dimensions, camera angle, composition, and black powder-coated metal material. Do not redesign or modify the adapter in any way. The cylindrical metal locking pin from image 1 must pass horizontally through the rear lock hole of the adapter and be fully inserted, with the pin axis perfectly aligned with the hole axis to create a realistic mechanical installation. The hitch lock must keep its original appearance from image 1, including the polished silver metal pin, round metal cap on the head side, the locking cylinder with an inserted key, the small key ring with two metal keys, and the attached black rubber protective cap. The keys and key ring should hang naturally downward due to gravity. Maintain the same studio lighting and reflections as the adapter image, with realistic chrome reflections, natural shadows, and correct occlusion where the pin passes through the hole. The final result should look like a real installed hitch lock on the adapter, with photorealistic industrial product rendering quality.