Please look at the two 6 foot cords I am contemplating. I'm not an electrician. Which would replace my M4 2024 10 core iMac (A3137) power cord. I think the cord must be a IEC320 C5 to NEMA 5-15P 3 prong, (143W Power Adapter Extension Cable), whatever it's called. One cord is rated 1250 watts. I...