hello, 16 pin A30T hotend group is sku : 800-001-0729
https://www.geeetech.com/a10t-a20t-a30t-16-pin-connector-
-hotend-group-assembly-with-pulley-bracket-for-gt2560-v41b-v-
ersion-p-1300.html
if you already have #700-001-1289, you can exchange your original extension board to it , then it is ok
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