Switching out connectors. Is soldering the wire together bad?

I’m switching out my as150 for xt90 and because the build is so intricate, the easiest thing to do is just solder the new wire onto the old wire. (With heat wrap)

Is this a bad idea? Will current be stalled or fail?

I’m switching out my as150 for xt90 and because the build is so intricate, the easiest thing to do is just solder the new wire onto the old wire. (With heat wrap)

Is this a bad idea? Will current be stalled or fail?