ok i think ive found the PSU
i will buy x2 EVGA 1000GQ which is semi modular and 80 Gold Plus Cert.

https://b.scdn.gr/images/sku_images/014879/14879902/20151127151726_c3f9f3da.jpeg
is it compatible with motherboard and the 6 GPUs?i think they could be connected with no prob

and also...am i going to need this Dual PSU adaptor?
https://www.ebay.com/itm/Dual-PSU-adaptor-Double-Power-Supply-Adapter-Dual-Power-Supply-Connector/191568455861?
to connect both PSU to my motherboard?