The trade application forms can be downloaded here.
https://www.sc.com/sg/help-centre/form-centre.html#sme-banking
https://www.sc.com/sg/help-centre/form-centre-trade-services-import.html
https://www.sc.com/sg/help-centre/form-centre-trade-services-export.html
https://www.sc.com/sg/help-centre/form-centre-trade-services-guarantees-sblcs.html