u/Sullys_polkadot_ears

I’m new at the ebike stuff and have been bonding with my roadster v3 since I put it together 3 weeks ago. I am finding that my hands get numb while riding and can’t figure out why. I’m also wondering what this adjustment is at base of handlebars … Thanks!

Everything was going great putting this rack on until I could absolutely not unscrew the bolts for the long arm that is shared with fender brackets. I tried both sides and I couldn’t do it…. HELP!!