start stratum-proxy by simply issuing command "java -jar stratum-proxy.jar -f stratum-proxy-nicehash.conf"
you can visit stratum-proxy dashboard at "http://[IP of your PC or Server]:8888/"
connect your miners to stratum-proxy - make sure you use http:// in url connection string, indicating getwork protocol; due to getwork protocol specifics please also set appropriate scan-time and expiry parameters with low enough values (in range 1 - 15), for example:

cgminer -o http://[IP of your PC or Server]:8332 -u x -p x --scan-time=1 --queue=0 --expiry=1