1966 Safari LED Tail Light Upgrade

[Pat H]

I'm trying to replace the tail lights on my 1966 Safari with LED upgrades that I purchased from Inland (part # 65601). My problem is that the original fixtures have the old three filament system, large bulb w/two filaments and a small top bulb with one. Additionally, the wires on the old assemblies are different colors. For example, the curb side light has a brown wire where the street side has red. In short, how do I go about installing the new LED replacements? I'm a new member, and have little electrical knowledge/experience.

Thanks in advance for your help!

Pat