Hi,
Try the below steps, strat date wherever applicable should be set correctly as per your requirment:
1) Create a new symbolic account with Account assignment type K.
2) Assign your loan wage type to this symbolic account.
3) Ask the FI team which clearing account should be used. Assign this to the key 1001 in the step 'Assign Technical accounts'.
4) In the step 'Assign Vendor accounts', create a new entry. Enter the symbolic account you created and under account, enter *0002
You may need some more config depending on you FI set up. Try the above steps first, test it and let me know.