3/8" steel torque arm

I made myself a torque arm out of 10mm S235JR steel. Now the arm itself should be bulletproof i'm not sure if my frame will. But i'm not sure about the mount location. On the chain side i can only bolt on a small hole and on the brake side i will bolt it to the IS mount.

My system is:
9C 2805 (With an calculated torque of about 110Nm)
Controller is 100v 45A
72V 13Ah 18650 Pack (200mOhm Ri)

To all experts, can i expect to run without fear of a breaking frame.

Some pictures.

This side only is bolted in the small M5 hole same as on the second picture



Here i will also use 10mm or 3/8" S235JR steel, but bolt it to the IS mount

That little screw might see 300kg of sheer, If nothing was helping it. Long as it's a good grade I wouldn't expect any problems.



Most bikes I see have a 5 or 6mm hole set with the same relationship to the axle. I have a few here. Yet I have never seen a torque arm made to pick up on them. I have made some egg shaped ones, with the axle hole just a few degree's out, to make the egg lean. I offer them up and drill the 5/6mm hole where needed. Somebody needs to make them....

Why not use the closest brake calliper mounting point? You just need a longer screw...

Yeah i wrote that also, but as the english language is not my mother tongue I might have wrote unprecise.

My idea was to make one in the IS brake caliper mount , and on the other side screw it with a M5. But I have doubt this will
hold against 11Nm