I can’t seem to open your image.
An outward force towards the beginning of the record is what the anti-skate causes. An inward force towards the end of the record and spindle is what the normal playing forces in the groove with an S tonearm cause minus the anti-skate force and this increases with downforce.
You need a blank side or at least a substantially-large band in order to marginally set anti-skate. The end of a record with wide spaces between the groove might be sufficient to at least make sure the anti-skates are both functioning at all. Try setting the needle between the gooves and see if it moves inward to catch the groove, outward, or stays about where it is and the groove finds the needle as it rotates depending on the anti-skate setting.
There’s no perfect anti-skate setting since it will overdo it towards one end of the record and underdo on the other… unless you’ve got an exotic turntable with a completely different anti-skate mechanism like some old Sonys. The higher your anti-skate setting for a given downforce, the less likely the record will skip forward in normal play and the potentially lower the intermodulation distortion (requires a test tone track to be sure on that second issue), but the more likely it will skip backward when you rotate the record in reverse.
Shure Whitelabel tips were also notorious for having poorly-aligned cantilevers and very mushy lateral compliance, so it’s hard to know just from your description what’s going on.