example.js

// option 1 - async 
async function draw() {
    var contactId = parent.Xrm.Page.data.entity.getId();
    connections = await getConnectionsByContactId(contactId);
}

async function getConnectionsByContactId(contactId) {
    const result = await Xrm.WebApi.retrieveRecord("contact", contactId,
        `?$expand=contact_connections1($select=_record2id_value,connectionid,name,record2objecttypecode,entityimage_url)
        &$select=contactid,fullname,entityimage_url`);
    return result;
}

// option 2 - promises

function draw() {
    const contactId = parent.Xrm.Page.data.entity.getId();
    connections = getConnectionsByContactId(contactId).then(connections=> {
      //do your drawing here
    });
}

function getConnectionsByContactId(contactId) {
    return Xrm.WebApi.retrieveRecord("contact", contactId,
        `?$expand=contact_connections1($select=_record2id_value,connectionid,name,record2objecttypecode,entityimage_url)
        &$select=contactid,fullname,entityimage_url`)
        .then(resultToken => {
            return resultToken;
        })
        .catch(error => {
            throw error;
        });
}