Either the search function sucks or my key words do.... Leaning towards my key words

I am looking to see if there is a way to add the same attributes to large amounts of products?

Example:
I sell auto parts. I have 35 wiring harnesses that have the same 6 plug options for each. I have 1 set up with the attributes and working correctly.

I am wondering if there is a way to attach the attributes to a large bunch of these products without doing them all manually?