hi!
Been fallowing this site for a while and finally joined. Lot of cool stuff on here!

I'm instaling a three prong cord onto a early 70s Heathkit TA-16 and I have two questions because I've encountered two things I'm not familiar with:

1) this amp uses circuit breakers instead of fuses (one in the Mains circuit and one right before the rectifier). They are pretty janky (but cool) looking things that just sort of crimp onto the chasie. Wondering if there is a way to test them to make sure they are functioning properly. Or should I replace them with fuse holders? Are fuses superior/inferior/comperable?
I've also considered an IEC power inlet jack that includes a fuse. If I use one, what would be an appropriate fuse?

2) the power transformer has four primary leads. Looking online it seems that it means there are two coils on the primary side, and these four are the ends of each coil. From my research it looks like you can wire them in series to accommodate UK mains and in parallel to work with US 120VAC.

My question is: what is the best way to connect the leads together so I can attach them to the neutral wire of my AC cord and the others to one side of the ON/OFF switch?

Any advice about these questions would be greatly appreciate! Or if I need to clarify my questions I can.
Thank You!!
Jason