How to concatenate json or string outputs from two nodes

Adding one more sample of Json just to clarify how columns can vary in elements and connections:

{
elements”: [
{
“Label” : “Company1”,
“Type” : “Type A”,
“Leadership” : “Person1, VP, Department1|Person2, CEO, Department2…”,
“Website” : “www.company1.com
}, {
“Label” : “Company2”,
“Type” : “TypeB”,
“Description” : “Company2 description”,
“Website” : “www.Company2.com
}, {
“Label” : “Company3”,
“Type” : “TypeB”,
“Description” : “Company3 description”,
“Website” : “www.Company3.com
}
],
connections”: [
{
“From” : “Company1”,
“To” : “Company2”,
“Type” : “Contractual”,
“Description” : “Connection1 description.”
}, {
“From” : “Company2”,
“To” : “Company3”,
“Type” : “Contractual”,
“Description” : “Connection2 description”
}
]
}