Making parts for connection

A crank is cutted.

Then, it is putted in rectangular.

The crank isn't on horizontal line. By grinding, it was adjusted.

Good ! Next task is welding them. For that we need making incisions.

Like this. The width of incisions better is wider.

I had a mistake on welding. I could welded it but they aren't connected. Above photo, I tried welding again. The problem is guessed the stream of electric.
At first time, I connected the plug to the rectangular. It was fault.
At second time, I connected the plug to the crank. I could weld them.

Then grinding.

I did the both side with same way.

This is front shot. I should do the tasks more perfectly ?

Fine.