Splicing power wire on Wireless Camera

My Lorex Wireless Camera has a power wire with a female connector on the end which then plugs in to the male connector of the 12 volt power adapter.

I had to cut the wire about a foot from the camera (before the female adapter) in order to remove it. I trimmed the single wire coming from the camera (assuming there would be two wires inside to splice)but there is only one wire and some fine strand wire around it which I pulled back out of the way. I spliced the single wire to the female connector portion and plugged it in ..but no dice.

Do I need to some how splice all the fine strand wires together also?

…Or would I be able to buy a new female connector for it and put it on? (Shorten the wire)

Thanks,