Speakers with RCA plugs

Hi,
My speaker system is set up like this.

I'd love to just have one receiver, but the speakers on receiver 1 are connected by RCA plugs, but the speakers on receiver 2 are connected directly by speaker wire.
To get the Receiver 1 speaker onto receiver 2, could I simply snip off the RCA plugs with scissors and attach then to the same ports as the Receiver 2 speakers?
The max input for the speakers of receiver 1 is 35W, but for Receiver 2 it is 80W.
Thanks in advance.