It's best they stay connected to the main node, so they don't cause forks... but others should connect to those nodes if they are having issues connecting to the first node.
How to make it in that way?
check and make sure they aren't getting banned
ambercoin02.mooo.com now allow connections.
You can try it.
oh, cool... just added a second connect line to include ambercon02 node and it joins in smoothly... is assume that might be rather beneficial helping to avoid or at least lower the risk of the fork-by-stake problem many users seem to experience...
however, last time I checked my wallets, everything seems to be fine. running a couple hours in line now without an issue while staking/mining...
edit: 3rd node joined in just fine... now obviously on 3 connections, looks quite good

14:27:32

[
{
"addr" : "ambercoin01.mooo.com:31982",
"services" : "00000001",
"lastsend" : 1448890039,
"lastrecv" : 1448890039,
"conntime" : 1448890038,
"version" : 90001,
"subver" : "/AmberCoin:3.0.0.3/",
"inbound" : false,
"startingheight" : 601240,
"banscore" : 0
},
{
"addr" : "ambercoin02.mooo.com:31982",
"services" : "00000001",
"lastsend" : 1448890041,
"lastrecv" : 1448890041,
"conntime" : 1448890038,
"version" : 90001,
"subver" : "/AmberCoin:3.0.0.3/",
"inbound" : false,
"startingheight" : 601240,
"banscore" : 0
},
{
"addr" : "ambercoin03.mooo.com:31982",
"services" : "00000001",
"lastsend" : 1448890041,
"lastrecv" : 1448890050,
"conntime" : 1448890039,
"version" : 90001,
"subver" : "/AmberCoin:3.0.0.3/",
"inbound" : false,
"startingheight" : 601240,
"banscore" : 0
}
]