give me 1 moment. it only has 2 cables so if 1 cable feeds the 970 the one card tdp is 165 watts
and the other cable feeds 2x 1060 the combine tdp is 300 watts
you need to set msi afterburner at a 70% power setting
which would mean the 970 uses .70 x = 115,5 watts
and the 2 1060's use .70 x 300 = 210 watts
It would barely pass for being safe as 225 is the max and it means the msi afterburner needs to never f up.
What else is local?
can you find this?
https://www.newegg.com/Product/Product.aspx?Item=N82E16817438057https://www.walmart.com/ip/EVGA-SuperNOVA-750-P2-80-PLATINUM-750W-ECO-Mode-Fully-Modular-NVIDIA-SLI-and-Crossfire-Ready-10-Year-Warranty-Power-Supply/49059862it has 4 cables and will work fine for you