Do you have a chamber Andre or did you mean you'd have to go put one together to euthanize this male? A vet isn't likely to do work for free unless you have a vet you use regularily and they might do it for you for a reduced rate. I hope you have this injured male by himself now. It's best if you can either put him down yourself humanely or have a vet do it as soon as possible as that's got to be a painful thing for a male animal and there's no use letting him suffer needlessly.