My struct contains the pointer:

// define a structure to hold bid information
struct Bid {
    string bidId; // unique identifier
    string title;
    string fund;
    double amount;
    Bid *next;
    Bid() {
        amount = 0.0;
        next = NULL;
    }
};

void LinkedList::Append(Bid bid) {
    // FIXME (3): Implement append logic

    //reference bid being passed??? Bid struct has pointers, do we need another pointer?
    Bid *currNode = &bid;

    //set node's next pointer to NULL (end)
    currNode->next = NULL;

    //if list is empty
    if (head == NULL) {
        head = currNode;
        tail = currNode;
    }
    else {
        tail->next = currNode;
        tail = currNode;
    }
}