Series upgrade question

[peachhead]

I bought kit #3 from Scottyb. Everything makes sense, getting it all done except for some of the hardware.

I think I have all this figured out but wanted to check. The large ring connectors are for the resistor. The small ones for the diode, red on the stripe end for pos. I know where the fuse goes. What are the smaller bolt and the round head bolt for? I would think the fuse connection needs to be tight and I don't know how to get any torque on the round head bolt.*

Can anybody that has done this already explain it?