Design your SVG floorplan or dashboard for HABPanel with Inkscape

I tried to place some elements for blind control … Up, Stop, Down…
However the whole SVG is too crowded and I would rather use a Slider for this.
Can a slider be used in the SVG?
Thanks!

Current:

Would like to:
maybe a slider like this.. which could replace the “window” itself and could control the blind and the same time show the current %state