Motor Controller Upgrade for Power Plus Motorized Dolly

How to install a motor controller upgrade kit from Jolly Dolly on a Power Plus motorized dolly.

[@griselyinedquinterolosada8632]

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[@cutenapusa666]

I have similar like yours the brushed motor w/ planetary gear but different variant MY1020zxfh (450w/48v) for my DIY cargo e-trike. I have a question, my stock controller is 500w. It is ok to upgrade for 800w controller? Im just worry if I burn the motor since I use it daily transport of goods.