in ConnectionObject.h

@property (nonatomic, strong) NSString *address
...

-(id)initWithAddress:(NSString *)address hostName:(NSString *)hostname port:(NSString *)port socket:(NSString *)socket;

in ConnectionObject.m
-(id)initWithAddress:(NSString *)address hostName:(NSString *)hostname port:(NSString *)port socket:(NSString *)socket {
    if (self = [super init]) {
        self.address = address;
        ...
    }
    return self;
}

in place where your data coming to you...
ConnectionObject *object = [ConnectionObject alloc] initWithAddress:address hostName:hostname port:port socket: socket];

[connectionArray insertObject:object];