Adding text to a drawing for a cutting file (SVG)

I'm new to corel, I'm using it to create files for my CNC router.  I have this file, and I want to add a letter.  I thought I could do this using the "weld" feature.  However, It doesn't work when I try to cut it, the edges of the letter aren't welded to the sides of the mason jar.  Can anyone help me?

Digital File - Mason Jar Patterns for Monogram with SVG, DXF, PNG  Personal Use Only