If the addnode function is not aviable (don't know why, maybe because win build on another win version...) but anyway: create an ambercoin.conf file in ~/ambercoin directory:

rpcuser=anyuser
rpcpassword=anypass
rpcallowip=127.0.0.*
gen=0
server=1
listen=1
addnode=37.59.21.199
addnode=78.8.2.228
addnode=85.10.194.50


Do you know where ~/ambercoin is located on your disk, or having troubles finding it?