If their pan kit doesn't come with the stick, and that's the one they recommend, then you are fine. The only way that pan will work is with a block entry dipstick. It says 6.5 quarts. Put 6.5 in it. Making sure to fill the filter, and then check the safe level. You'll know then if it's accurate or not.
This is common practice on aftermarket Pans, combined with aftermarket dipsticks.
If ya put 6.5 in it, and it doesn't run on the ground, you know there's still 6.5 in it lol. Simply check the stick, and if it's a little off, scribe a line on it where you want it to show your version of "Full"
On solid steel dipsticks, some trim the bottom and ignore the previous markings if needed, or if really ambitious, tap the roll pin out of the handle and trim the top. And re drill the hole for the roll pin. But I wouldn't do that with a rope stick like that one.