Ok. Here's the last two. A storm and power outage prevented me to post.
So I made a flat place in an angle for drilling. I know I have to reprofile the chisel. It's sharp tho.
I haven't had a drill bit to drill wide enough holes so bought a 40 and a 35 mm flat drill bits. They were cheap but at least bad. Maybe the material isn't that bad, but they are kinda dull. Also they had a black coating to mask the fact that they are scratched all over. Couldn't fool me, I took a look. At first I judged the edge good enough (for government work) and got on with the drilling. Maybe with an electric drill it would have been enough, but I chose to do it with a hand cranked one. We call those Amerikáner, maybe I should look up the etymology for the other thread. Anyway it was pain to make even this shallow hole I have to sharpen the bits for sure. And I noticed the backside flat of the cutting edges are also scratched, so I have to make them nice and flat too.
Anyway this is what I have now. I'm gonna have problems with the thinner branch, the hole can't go too deep or I'll pierce the upper surface of the log.