Enter encryption key once for two encrypted pools?

[spflanze]

I have a working Ubuntu 22.04 installation on a RAIDed encrypted ZFS file system. The procedure I followed can be downloaded from:
https://www.mediafire.com/file/2w8mdb96tbzslub/Ubuntu_22.04_Root_on_ZFS_Encryption.odt/file

Because I encrypted both rpool (root pool), and the hpool (home pool which is assigned the directory /home, when I log in I must enter my encryption key twice, once for each pool. The encryption key (actually the wrapper key) is the same for both pools. I seek to have to enter it only once for both pools.

The statements that created the are:
zpool create -f \
    -o ashift=12 \
    -o autotrim=on \
    -O encryption=on -O keylocation=prompt -O keyformat=passphrase \
    -O acltype=posixacl -O xattr=sa -O dnodesize=auto \
    -O compression=lz4 \
    -O normalization=formD \
    -O relatime=on \
    -O canmount=off -O mountpoint=/ -R /mnt \
       rpool mirror ${SSD1}-part4  ${SSD2}-part4

zpool create -f \
 -o ashift=12 \
 -o autotrim=on \
 -O encryption=on -O keylocation=prompt -O keyformat=passphrase \
 -O acltype=posixacl -O xattr=sa -O dnodesize=auto \
 -O compression=lz4 \
 -O normalization=formD \
 -O relatime=on \
 -O canmount=off -O mountpoint=/ -R /mnt \
    hpool mirror ${HDD1}-part1  ${HDD2}-part1

When hpool is created is there a value I can give to the "keylocation" parameter that would automatically make the key the same as it is for rpool so the key need be entered only once?