scp  id_rsa.pub ansible@192.168.99.111:/var/home/
Password:
id_rsa.pub                                                        100%  520    77.8KB/s   00:00

or

/project # sftp ansible@192.168.99.11
ansible@192.168.99.11's password:
Connected to 192.168.99.11.
sftp> put /var/home/.ssh/id_rsa.pub  /var/home/.ssh/id_rsa.pub
Uploading /var/home/.ssh/id_rsa.pub to /var/home/.ssh/id_rsa.pub
/var/home/.ssh/id_rsa.pub                                                       100%  386   502.9KB/s   0.4KB/s   00:00

sftp> ls .ssh/
id_rsa.pub

sftp> pwd
Remote working directory: /var/home/

sftp> exit
/project #

After a reboot of the server the key may change, will need to be reload on the vMX!