wordpress MultiPOS - Point of Sale (POS) for WooCommerce plugin need it to pay with Sprout invoices plugin

hello
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Plugin we used :
" Sprout invoices for sale are invoices " Integration "
this plugin already have form Integration to help us to input client or invoice via form
with wordpress plugin
Gravity Forms + Sprout Invoices ( plugin working fine and files in attachment )
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what we need
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need to make the same Integration but with Fluent Forms
to help us to add only " clients to invoice plugin via Fluent Forms ""
link to form : https://wordpress.org/plugins/fluentform/
i already have Fluent Forms pro plugin

thanks so much