Here are the metadata dumps, un/luckily all the owners appear to be 0 so either wupserver doesn't know about Wii-mode owners or they're actually 0.......
C:\Users\Ryccardo\Downloads>python -i wupclient.py
>>> mount_slccmpt01()
>>> w.stat("/vol/storage_slccmpt01/shared1/0000004c.app")
flags: 0x0
mode: 0x660
owner: 0x0
group: 0x0
size: 0x12c38
>>> w.stat("/vol/storage_slccmpt01/title/00000001/0000003a/content/00000000.app")
flags: 0x0
mode: 0x660
owner: 0x0
group: 0x0
size: 0x40
>>> w.stat("/vol/storage_slccmpt01/title/00000001/0000003a/content/title.tmd")
flags: 0x0
mode: 0x660
owner: 0x0
group: 0x0
size: 0x490
>>> w.stat("/vol/storage_slccmpt01/ticket/00000001/0000003a.tik")
flags: 0x0
mode: 0x660
owner: 0x0
group: 0x0
size: 0x2a4
Pfft, to prove that the owners of system files are indeed 0, just check a regular game:
>>> w.stat("/vol/storage_slccmpt01/title/00010000/53583450/data/monado01")
flags: 0x0
mode: 0x640
owner: 0x102b
group: 0x3031
size: 0x28000
So if you wanted to try this, you would type the following into wupclient:
mount_slccmpt01()
w.chmod("/vol/storage_slccmpt01/title/00000001/0000003a/content/00000000.app", 0x660)
w.chmod("/vol/storage_slccmpt01/title/00000001/0000003a/content/title.tmd", 0x660)
w.chmod("/vol/storage_slccmpt01/ticket/00000001/0000003a.tik", 0x660)