this can be done right?. what do i need to take off the other car to put on mine??

The aux ports are the same on both series.

i though the ones on the s5 were not operated by back pressure but electronically

You asked about the ports - they are the same.

The source for actuation power on the S5 is the air pump instead of exhaust. This does not change the ports that I know of.

Some guys have added a bleeder line from th air pump as a conversion which is very inexpensive & some have done some nice electric conversions. There is existing threads on this (lengthy) subject if you do a search.