The first thing I wanted to do is mounting the lasers in the cats hat. The difficult part is getting them as parallel as possible. Mounting them both one at a time would have been a fairly difficult way, because I didn't want to drill the head open and I only can operate with tweezers in the cat.

The solution was to measure the distance between the eyes, mount one contact of each diodes with a stiff piece of wire to a perfboard and an the other contact with stranded wire. Power both both LEDs (I wired them in parallel) and tweak until they are parallel.