is there anyway to use 2 of those in parallel for the S17+
NO! Unless a PSU is specifically made for what is called n+1 (paralleled) current sharing operation and correctly wired to use that mode NEVER EVER connect 2 or more PSU's in parallel. One will always have a slightly higher or lower voltage output than another and they will fight each other trying to regulate the voltage and supply power to a load. Great way to fry circuits...
Another concern is how the miner is regulating voltage to the chips: As I recall the S17 does not use on-board Vcore regulators -- like most if not all recent miners it adjusts the PSU output to directly feed the chip strings whatever voltage they are set by autotune to use. That means the controller has to be able to talk with the PSU.
