Do not open mold by pulling the handles apart. Shake gently to unmold eggs. If the twine will be used, you can tie the eggs together and hang from a tree branch. If you want to tie the eggs around a tree trunk, use longer lengths of twine. The popular commercially available suet feeder is a wire cage that holds one cake of suet.
Some bird feeders have a hopper for seeds and suet cages on the sides of the hopper.
We use these every winter and have had great success. Attaching wire mesh to a tree trunk or suspending it from a branch. Hanging a nylon mesh onion bag from a tree branch. A log feeder. Simply smearing soft suet mixtures on tree trunks.