Some real bodybuilders work: Solid 6mm2 supplying fuses in an old Fuse Panel. one wire supplies 5 fuses without an interrupt! they just removed the insulation, bent a "U" and continued to the next fuse.
That's about what I had to do some time ago. Finally I gave a d*n on the regulations and went to 4mm2 as the stuff was only fused 20A anyway. Didn't get the idea of looping though, tried to get 2 wires under the screws (yes, the screws were even long enough to do that). Finally I left all that stuff alone and installed the original 2 circuit Diazed assembly with bus bars alongside of a 4 circuit + RCD breaker panel. The electrician gave me a slightly weird look when he saw Diazed, but signed it off without any further ado.
The 70mm2 stuff looks like the cable they wired our house service with (8 apartment building).
BTW, contour plugs aren't 10A, they're 10-16A (DC/AC), just like Schuko plugs. However, some carry lower ratings, depending on the appliance they're connected to. My Grundig reel-to-reel tape recorder has one rated as low as 2.5A.
