Help automate arrowhead creation >

I have a line that imports into Adobe Illustrator as from an SVG. I do this via the Place command. It has certain coordinates that are specific to automation. I mean by automation that the line is created to our needs by other software. Once Placed in Illustrator, the line states path, as determined by the Appearance Panel.

I want to have a fast way to apply an arrowhead to the line. I went to the stroke part of properties and did so. To use this again, I made it into a Graphic Style. I see it there and in the Appearance Panel. Now my problem is when I create a new item from SVG, it sometimes does not have the same color. Then when I apply my arrowhead Graphic Style, the color changes. Is there a way to only apply the arrowhead and not the other properties of the stroke?

I explained the Placing of the SVG because I figured I might get some workarounds about getting an arrowhead on this line. Any ideas are welcome. I wish I could bring the SVG in with an arrowhead. However, when I let the other software create the SVG with an arrowhead I cannot properly drag the arrow (via Direct Selection Tool) where it needs to point. It skews and loses its shape. When I do it by adding Illustrator stroke property, it orientates correctly and is perfect in every way.

Ultimately I would want a way to get an arrowhead I want that can be applied to any color line and further automate my process with something like an Action. Thanks for any help.