DUAL BATTERY TIME. Making a second battery mount on my wallke x3 pro. Extra range in a ebike

This is a relatively easy way to build a secondary battery mount for your ebike. If you don’t want to do this but still watched thanks. Here’s a list of materials and tools.
Tools
Jigsaw-used Diablo metal cutting blades
Drill and bits.
Wire strippers
Soldering iron and solder.
(Not needed) a bench grinder to smooth metal.
Materials
Extension wire-
Xt60 connectors- a.co/d/02VE2LM
Same size wire-a.co/d/7S630PB
Actual mount-
U-bolts-www.lowes.com/...
Steel used-www.homedepot....
Additional bolts-www.harborfrei...
2-1 adapter www.amazon.com...