How to Connect already running bitcoind in AWS to Insight API in different AWS Server
Follow the instructions on this README. It should install bitcore (the bitcoin full node implementation by Bitpay), insight-api, and insight-ui. The instructions are:

npm install -g bitcore@latest
bitcore create mynode
cd mynode
bitcore install insight-api
bitcore install insight-ui
bitcore start


If that doesn't sync with the bitcoin network and start showing blocks, then please share some logs/errors and we can help you further.