Upload Itermediate certs throw API

Hello

Is it possible to upload intermediate certs to FortiADC throw API interface?

If use this document

https://fortinetweb.s3.amazonaws.com/docs.fortinet.com/v2/attachments/9f9d6c40-0d74-11eb-96b9-00505692583a/fortiadc-restapi-deployment-guide.pdf

I can see function

 /api/upload/certiicate_local

But it use for private\public key, but not intermediate

Also, in API REFS exists such methods:

/system_certificate_intermediate_ca

But in API refs

https://s3.amazonaws.com/fortinetweb/docs.fortinet.com/v2/attachments/85986864-2436-11e9-b20a-f8bc1258b856/fortiadc-v5.0.0-rest-api-reference.pdf

theris no example for POST methods

only
"POST": {
"Response": {
"payload": -149
}
}

Can anybody help me?