Update SAP EHP1 for NetWeaver 7.3 Java stack only via support package stack

Hi experts,

A question on Netweaver 7.3 Java stack.

Is there anyone using the SAP EHP1 for NetWeaver 7.3 Java stack only? I am using it and I wish to update it via support package stack. However, the SAP info () states the followings:

    Implementation and maintenance of SAP EHP1 for SAP NetWeaver 7.3 via SP Stacks is only possible via SAP Solution Manager's Maintenance Optimizer (MOPZ).

        https://websmp102.sap-ag.de/~form/handler?_APP=00200682500000002672&_EVENT=DISPLAY&_SCENARIO=01100035870000000122&_HIER_KEY=501100035870000015092&_HIER_KEY=601100035870000179415&_HIER_KEY=601100035870000235569&_HIER_KEY=701100035871000561809&   

From what I understand, since MOPZ only available on the ABAP stack, I am unable to use MOPZ. Hence, there is no way to update the Java stack via support package stack. So I can only update the AS Java via downloading individual patches in form of SCA files from "Support Packages and Patches". This too I am not so sure that I would be able to install them via Software Update Manager (SUM).

Is this understanding correct? I hope I am wrong about this.

Please correct me if I am wrong.

Thanks.