Instead of shortening them (as long as weight isn't a concern) then you can consider folding them back on themselves and then using shrink wrap to hold them that way makes those super long leads nice and tidy without the special tools.
Couple of examples of what I came up with. They seem to stay put the way I have them but a small piece of double sticky tape will keep the wiring in place if you are worried about it.
Couple of examples of what I came up with. They seem to stay put the way I have them but a small piece of double sticky tape will keep the wiring in place if you are worried about it.